Patent US3431245A successfully refreshed from Google Patents.
US3431245A
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US
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Production of novel polymers and polymerization process therefor
Assignee: Polysar Ltd
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Filing: 1964-09-14
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Granted: 1969-03-04
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Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Wolfgang Helmut Scherf
- 👤 John Frederick Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2615; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3110695A
Cited
US3225120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |