US3377308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-step process for the production of solutions of segmented polyurethane polymers
Assignee: Bayer AG
•
Filing: 1963-09-03
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Granted: 1968-04-09
•
Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Harald Oertel
- 👤 Heinrich Rinke
- 👤 Wilhelm Thoma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:22
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/721; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT155629B
Cited
FR1112409A
Cited
US2957852A
Cited
US3054755A
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US3202636A
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DE1123467B
Cited
GB917450A
Cited
US3149988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |