US3487080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing isocyanate trimer
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1968-01-18
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Granted: 1969-12-30
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Expires: 1988-01-18
Abstract
No abstract record available.
Inventors
- 👤 Yutaka Matsui
- 👤 Jugo Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/02; C08G18/022; C08G18/08; C08G18/09; C08G18/092; C08G18/10; C08G18/16; C08G18/161; C08G18/18; C08G18/1875
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |