US3519462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating polymethyl methacrylate
Assignee: Wyeth Holdings LLC
•
Filing: 1966-03-21
•
Granted: 1970-07-07
•
Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Alexander Christian Bristol
- 👤 Allan Ellis Sherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J7/044; C08J7/046; C08J7/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1747861A
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US2086590A
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US2059856A
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US2120552A
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US2153358A
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US2364112A
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US3042624A
Cited
US2938811A
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US3307900A
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US3297462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |