Patent US3655830A successfully refreshed from Google Patents.
US3655830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatible mixtures of methyl methacrylate polymer and high molecular weight ethylene oxide polymer
Assignee: Wyeth Holdings LLC
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Filing: 1969-11-18
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Granted: 1972-04-11
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Expires: 1989-11-18
Abstract
Abstract COMPOSITIONS OF MATTER COMPRISING POLYMERS OF METHYL METHACRYLATE HAVING BLENDED THEREWITH FROM ABOUT 10% TO ABOUT 30%, BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MIXTURE, OF A POLYMER OF ETHYLENE OXIDE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 50,000, ARE DISCLOSED.
Inventors
- 👤 Terry Edward Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:15
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L71/00; C08L71/02
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |