US2448666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene-polyvinyl acetal composition
Assignee: EIDP Inc
•
Filing: 1944-06-14
•
Granted: 1948-09-07
•
Expires: 1964-06-14
Abstract
No abstract record available.
Inventors
- 👤 David A Fletcher
- 👤 Malcolm M Renfrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:46
CPC Classifications
C; C09; C09D; C09D129/00; C09D129/14; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31942; Y10T428/31949; Y10T428/31957
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1927086A
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US2137442A
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US2153553A
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US2188707A
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US2278141A
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US2279774A
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US2212155A
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US2268121A
Cited
US2326698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |