US3399167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes stabilized with dialkyl semicarbazides or dialkyl carbazinic acid esters
Assignee: Bayer AG
•
Filing: 1964-05-14
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Granted: 1968-08-27
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Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Rosendahl Friedrich Karl
- 👤 Rinke Heinrich
- 👤 Oertel Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124543A
Cited
US3074911A
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US2999839A
Cited
US3151098A
Cited
US3095322A
Cited
US3149998A
Cited
US3351608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |