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US3475374A
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US
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Quinoxaline polymer compositions
Assignee: Research Corp
•
Filing: 1968-02-06
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Granted: 1969-10-28
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Expires: 1988-02-06
Abstract
No abstract record available.
Inventors
- 👤 Carl S Marvel
- 👤 Masahiko Okada
- 👤 Frans De Schryver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:49
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0683; C08G73/0694; Y; Y10; Y10S; Y10S428/00; Y10S428/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3326915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |