US3397253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydantoin polymer prepared by the reaction of glycine derivatives and polyisocyanates
Assignee: Bayer AG
•
Filing: 1966-03-04
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Granted: 1968-08-13
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Expires: 1986-03-04
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
- 👤 Dunwald Willi
- 👤 Miclke Karl-Heinz
- 👤 Reese Eckart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
C; C08; C08L; C08L63/00; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3821; C08G18/3823; C08G18/3825; C08G18/65; C08G18/66; C08G18/6633; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616; C08L77/00; C09; C09D; C09D175/00; C09D175/04; C09D175/06; Y; Y10; Y10S; Y10S260/00; Y10S260/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3296208A
Cited
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 |