Patent US3388087A successfully refreshed from Google Patents.
US3388087A
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Aqueous dispersions of quaternized polyurethanes
Assignee: Bayer AG
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Filing: 1963-10-23
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Granted: 1968-06-11
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Dieterich Dieter
- 👤 Bayer Otto
- 👤 Peter Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/10; Y; Y10; Y10S; Y10S424/00; Y10S424/02; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/07
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |