US3479325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing substantially anhydrous polyurethane compositions using an organic sulfonyl monoisocyanate
Assignee: Bayer AG
•
Filing: 1966-12-29
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Granted: 1969-11-18
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Expires: 1986-12-29
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Blomeyer
- 👤 Gunter Oertel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/088; C08G18/0885; Y; Y10; Y10S; Y10S528/00; Y10S528/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3330849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |