US3551390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of para-isopropenylphenyl isocyanate
Assignee: Bayer AG
•
Filing: 1967-10-19
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Granted: 1970-12-29
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Expires: 1987-10-19
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Krimm
- 👤 Georg Malamet
- 👤 Hermann Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/26; C08F26/00; C08F283/00; C08F283/01; C08G18/728
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |