US3487051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-imidazopyrrolone condensation polymers
Assignee: SWCC Corp
•
Filing: 1967-01-10
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Granted: 1969-12-30
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Expires: 1987-01-10
Abstract
No abstract record available.
Inventors
- 👤 Munehiko Suzuki
- 👤 Etsuo Hosokawa
- 👤 Shinsuke Hirata
- 👤 Tetsuo Hoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:35
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3305575A
Cited
US3414543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |