Patent US1912531A successfully refreshed from Google Patents.
Patent US2968576A successfully refreshed from Google Patents.
US2968576A
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US
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Process of coating a polyethylene substrate with a vinylidene coating and resultant article
Assignee: Howard Plastics Inc
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Filing: 1955-07-19
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Granted: 1961-01-17
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Keller
- 👤 Charles W Garvin
- 👤 John G Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:37
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/08; B29C66/00; B29C66/004; B29C66/70; B29C66/71; B32; B32B; B32B27/00; B32B27/06; B32B27/08; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/048; B29C65/00; B29C65/02; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2995/00; B29K2995/0037; B29K2995/0065; B29K2995/0067; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08J2427/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A STRIP FOR MAKING A SUBSTANTIALLY GAS IMPERMEABLE POLYETHYLENE CONTAINER HAVING A MODIFIED SURFACE AND A VINYLIDENE CHLORIDE POLYMER DIRECTLY INTEGRATED WITH SAID MODIFIED SURFACE OF SAID POLYETHYLENE, WHEREBY SAID POLYETHYLENE IS RENDERED SUBSTANTIALLY IMPERMEABLE TO AIR, NITROGEN, OXYGEN AND CARBON DIOXIDE, SAID STRIP COMPRISING A POLYETHYLENE BASE HAVING A MODIFIED SURFACE AND A VINYLIDENE CHLORIDE POLYMER DIRECTLY INTEGRATED WITH THE MODIFIED SURFACE OF SAID POLYETHYLENE.
Claim 2
Dependent Claim
66 words
A STRIP FOR MAKING A SUBSTANTIALLY GAS IMPERMEABLE POLYETHYLENE CONTAINER HAVING A MODIFIED SURFACE AND A VINYLIDENE CHLORIDE POLYMER DIRECTLY INTEGRATED WITH SAID MODIFIED SURFACE OF SAID POLYETHYLENE, WHEREBY SAID POLYETHYLENE IS RENDERED SUBSTANTIALLY IMPERMEABLE TO AIR, NITROGEN, OXYGEN AND CARBON DIOXIDE, SAID STRIP COMPRISING A POLYETHYLENE BASE HAVING A MODIFIED SURFACE AND A VINYLIDENE CHLORIDE POLYMER DIRECTLY INTEGRATED WITH THE MODIFIED SURFACE OF SAID POLYETHYLENE.
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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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |