US3607485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making glass razor blades
Assignee: Corning Glass Works
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Filing: 1967-10-23
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Granted: 1971-09-21
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Expires: 1987-10-23
Abstract
Abstract A blank of vitreous material is accurately ground to a desired razor blade configuration with specific dimensions, which are a multiple of the dimensions of the end product as represented by a predetermined attenuation ratio, and the blank is heated to about its softening point and drawn down with a desired attenuation to produce a continuous razor blade ribbon of uniform predetermined cross-sectional dimensions. The ribbon is then polished in an acid bath, provided with a lubricating coating, and cut into desired lengths for packaging.
Inventors
- 👤 Alan C Bailey
- 👤 Harold E Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/037; B; B26; B26B; B26B21/00; B26B21/54; B26B21/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
53 words
A method of producing glass razor blades as defined in claim 1 wherein the relative dimensions of the blank and the ribbon are maintained during attenuation such that the width of the blank is to the width of the ribbon as the thickness of the blank is to the thickness of the ribbon.
Claim 2
Dependent Claim
25 words
A method for producing glass razor blades as defined in claim 11 wherein the ribbon is subjected to a bath of hydrofluoric and sulfuric acids.
Claim 3
Dependent Claim
55 words
A method of producing glass razor blades as defined in claim 1 wherein the ribbon is alternately polished in an acid solution and washed in an aqueous solution, a fluorocarbon resin coating is then applied to the acid-polished glass ribbon, and the coated ribbon is then cut into razor blades of desired length for packaging.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |