US3539483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic polyurethane dispersions and a process for the production thereof
Assignee: Bayer AG
•
Filing: 1968-03-18
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Granted: 1970-11-10
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Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Keberle
- 👤 Gunter Oertel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/10; C08G18/28; C08G18/40; C08G18/61; C08G18/70; C08G18/72; C08G18/73; C08G18/74; C08G18/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3023193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |