Patent US3641197A successfully refreshed from Google Patents.
US3641197A
Expired / Lapsed
US
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Polymer compositions and method for the production thereof
Assignee: Wyeth Holdings LLC
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Filing: 1969-04-17
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Granted: 1972-02-08
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Expires: 1989-04-17
Abstract
Abstract A METHOD FOR THE PRODUCTION OF COMPOSITIONS COMPRISING A POLYMER OF METHYL METHACRYLATE, A COPOLYMER OF ETHYLENE, AND A POLYALKYLATED POLYMETHYLOLMELAMINE AND THE PRODUCTS PRODUCED THEREBY, ARE DISCLOSED.
Inventors
- 👤 William Dean Holland
- 👤 Joseph Michael Schmitt
- 👤 Richard Mcdonald Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:36
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F8/00; C08F8/30; C08F8/32; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08F2800/00; C08F2800/20; C08L51/00; C08L51/06
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |