US3476712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing novel polyester amides
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1966-09-26
•
Granted: 1969-11-04
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Kenichi Fukui
- 👤 Tsutomu Kagiya
- 👤 Shizuo Narisawa
- 👤 Taneo Maeda
- 👤 Mikio Kobata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2396248A
Cited
US2386454A
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US2463977A
Cited
US3216974A
Cited
US3153017A
Cited
US3272774A
Cited
US3272776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |