Patent US3491050A successfully refreshed from Google Patents.
US3491050A
Expired / Lapsed
US
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Polyurethane dispersions
Assignee: Bayer AG
•
Filing: 1966-08-31
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Granted: 1970-01-20
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Keberle
- 👤 Artur Reischl
- 👤 Dieter Dieterich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0804; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3388087A
Cited
US3264134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |