Patent US3499853A successfully refreshed from Google Patents.
US3499853A
Expired / Lapsed
US
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Polyamides
Assignee: Bayer Pharma AG
•
Filing: 1968-03-22
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Granted: 1970-03-10
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Expires: 1988-03-22
Abstract
No abstract record available.
Inventors
- 👤 Eugen Griebsch
- 👤 Manfred Drawert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:45
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08G69/00; C08G69/02; C08G69/26; C08G69/34; C08G69/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2130948A
Cited
US2379413A
Cited
US3257342A
Cited
US3297730A
Cited
US3239545A
Cited
FR1359955A
Cited
BE645836A
Cited
GB1000216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |