US3397184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastics
Assignee: Bayer AG
•
Filing: 1965-03-03
•
Granted: 1968-08-13
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Expires: 1985-03-03
Abstract
No abstract record available.
Inventors
- 👤 Heydkamp Wolfgang
- 👤 Kallert Wilhelm
- 👤 Muller Erwin
- 👤 Freytag Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/87; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/10; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3823; C08G18/67; C08G18/675; C08G18/677; C08G18/678
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |