Patent US3536663A successfully refreshed from Google Patents.
US3536663A
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US
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Stabilized polyurethanes
Assignee: Bayer AG
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Filing: 1967-12-05
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Granted: 1970-10-27
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Expires: 1987-12-05
Abstract
No abstract record available.
Inventors
- 👤 Harald Oertel
- 👤 Friedrich-Karl Rosendahl
- 👤 Heinrich Rinke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:52
CPC Classifications
C; C07; C07C; C07C255/00; C07C215/00; C07C215/46; C07C215/48; C07C215/54; C07C243/00; C07C243/24; C07C243/36; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/30; C08G18/32; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3825; C08G18/65
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) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |