Patent US2276437A successfully refreshed from Google Patents.
US2276437A
Expired / Lapsed
US
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Polymeric Materials
Assignee: EIDP Inc
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Filing: 1939-04-28
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Granted: 1942-03-17
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Expires: 1959-04-28
Abstract
No abstract record available.
Inventors
- 👤 Gordon T Vaala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:41
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 0
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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) | 1945-03-16 | 1945-09-15 | 1946-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-16 | 1949-09-15 | 1950-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-16 | 1953-09-15 | 1954-03-17 | $7700.00 | Window Closed / Lapsed |