US4907321A
Expired / Lapsed
US
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Enhanced color change interlocking closure strip
Assignee: Glad Products Co
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Filing: 1989-01-31
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Granted: 1990-03-13
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Expires: 2009-01-31
Abstract
Abstract An interlocking closure device including two closure elements arranged to be interlocked over a predetermined length, each of said closure elements having different colors for establishing visually the completeness of the occlusion of the closure elements by providing color different from the closure elements when said closure elements are occluded, wherein the improvement comprises the introduction of a color change enhancement member in the internal channel of a translucent closure element whereby the closing and opening of the closure device is more easily detected by visual inspection.
Inventors
- 👤 John W. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:15
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/25; B65D33/2508; B65D33/2541; B65D33/255; A; A44; A44B; A44B19/00; A44B19/10; A44B19/16; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/38; Y10S24/39; Y10S24/50; Y10T; Y10T24/00; Y10T24/25; Y10T24/2532; Y10T24/45; Y10T24/45152; Y10T24/45157; Y10T24/45168
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
188 words
In an interlocking closure device including male and female closure elements arranged to be interlocked over a predetermined length, each of said closure elements having different colors for establishing visually the completeness of the occlusion of the closure elements by providing a color different from the closure elements when said closure elements are occluded wherein at least one of the closure elements is translucent, wherein the improvement comprises the introduction of a translucent color change enhancement member, having an index of refraction, in the internal channel of a translucent closure element wherein said color change enhancement member is effective in improving the perceivable color change between said male and female closure elements having different colors and the different color formed by occlusion of the differently colored male and female closure elements and wherein said translucent color change enhancement member comprises at least one member selected from the group consisting of: (1) a generally right triangle-shaped translucent color change enhancement member: (2) a generally isoceles triangle-shaped translucent color change enhancement member; and (3) a translucent color change enhancement member comprising two generally stacked and overlapping triangle-shaped translucent color members.
Claim 2
Dependent Claim
188 words
In an interlocking closure device including male and female closure elements arranged to be interlocked over a predetermined length, each of said closure elements having different colors for establishing visually the completeness of the occlusion of the closure elements by providing a color different from the closure elements when said closure elements are occluded wherein at least one of the closure elements is translucent, wherein the improvement comprises the introduction of a translucent color change enhancement member, having an index of refraction, in the internal channel of a translucent closure element wherein said color change enhancement member is effective in improving the perceivable color change between said male and female closure elements having different colors and the different color formed by occlusion of the differently colored male and female closure elements and wherein said translucent color change enhancement member comprises at least one member selected from the group consisting of: (1) a generally right triangle-shaped translucent color change enhancement member: (2) a generally isoceles triangle-shaped translucent color change enhancement member; and (3) a translucent color change enhancement member comprising two generally stacked and overlapping triangle-shaped translucent color members.
Claim 3
Dependent Claim
20 words
An interlocking closure device according to claim 1 wherein said translucent color change enhancement member is a generally right triangle-shaped.
Claim 4
Dependent Claim
21 words
An interlocking closure device according to claim 1 wherein said translucent color change enhancement member is a generally isoceles triangle-shaped member.
Claim 5
Dependent Claim
23 words
An interlocking closure device according to claim 1 wherein said translucent color change enhancement member comprises two generally stacked and overlapping triangle-shaped members.
Claim 6
Dependent Claim
62 words
An interlocking closure device according to claim 1 wherein said translucent color change enhancement member comprises at least two members selected from the group consisting of: (1) a generally right triangle-shaped translucent color change enhancement member; (2) a generally isoceles triangle-shaped translucent color change enhancement member; and (3) a tanslucent color change enhancement member comprising two generally stacked and overlapping triangle-shaped members.
Claim 7
Dependent Claim
17 words
An interlocking closure devide according to claim 4 wherein said two triangle-shaped members are generally right triangle-shaped.
Claim 8
Dependent Claim
187 words
An interlocking closure device according to claim 1 including male and female closure elements arranged to be interlocked over a predetermined length, each of said closure elements having different colors, for establishing visually the completeness of the occlusion of the closure elements by providing a color different from the closure elements when said closure elements are occluded; wherein one of the closure elements is translucent and the other closure element is opaque; wherein the male closure element comprises a U-shaped channel element including an element portion comprising a bas portion having a pair of spaced-apart, parallelly disposed webs integrally attached to said base portion and extending therefrom, said webs terminating in hooks, said hooks comprising hook portions facing away from each other; wherein the female closure elements comprises a U-shaped channel element including an element portion having a base portion with a pair of spaced-apart, parallelly disposed webs attached to said base portion and spaced to pass over said webs on said male closure element, wherein said webs on said female closure element terminate in hooks extending toward each other to engage on said male closure element.
Claim 9
Dependent Claim
37 words
An interlocking closure device according to claim 7 wherein at least one of said closure elements has guide members integrally formed therewith and spaced adjacent to and apart from said parallelly disposed webs of said closure element.
Claim 10
Dependent Claim
19 words
The interlocking closure device of claim 8 wherein said guide members are integrally formed with said male closure element.
Claim 11
Dependent Claim
19 words
The interlocking closure device of claim 8 wherein said guide members are integrally formed with said female closure element.
Claim 12
Dependent Claim
13 words
The interlocking closure device of claim 8 wherein said guide members are triangularly-shaped.
Claim 13
Dependent Claim
13 words
The interlocking closure device of claim 8 wherein said guide members are rectangular-shaped.
Claim 14
Dependent Claim
135 words
An interlocking closure device according to claim 1 including male and female closure elements arranged to be interlocked over a predetermined length, each of said closure elements having different colors for establishing visually the completeness of the closure elements by providing a color different from the male and female closure elements when said closure elements are occluded, wherein one closure element is an opaque blue and the other closure element is a translucent yellow having a translucent color change enhancement member, having an index of refraction, in the internal channel of the translucent closure element wherein said color change enhancement member is effective in improving the perceivable color change between said male and female closure elements having different colors and the different color formed by occlusion of the differently colored male and female closure elements.
Claim 15
Dependent Claim
149 words
An interlocking closure device according to claim 13 including male and female closure elements arranged to be interlocked over a predetermined length, each of said closure elements having different colors for establishing visually the completeness of the occlusion of the closure elements by providing a color different from the closure elements when said closure elements are occluded wherein at least one of the closure elements is translucent, wherein the male closure element is an opaque blue and the female closure element is a translucent yellow and a translucent color change enhancement member, having an index of refraction, is present in the internal channel of said translucent yellow closure element wherein said color change enhancement member is effective in improving the perceivable color change between said male and female closure elements having different colors and the different color formed by occlusion of the differently colored male and female closure elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |