US3814776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydantoins and polyhydantoins containing olefin groups
Assignee: Bayer AG
•
Filing: 1972-03-07
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Granted: 1974-06-04
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Expires: 1992-03-07
Abstract
Abstract OLIGOHYDATOINS AND POLYHYDANTOINS WHICH CONTAIN OLEFINICALLY UNSATURATED GROUPS ARE PRODUCED BY REACTING POLYGLYCINE ESTERS ANDISOCHANATES WHICH CONTAIN AN OLEFINICALLY UNSATURATED GROUP, OPTIONALLY TOGETHER WITH DIOR POLYISOCYANATES.
Inventors
- 👤 R Fischer
- 👤 R Merten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3821; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/74; C08G18/70; C08G18/81; C08G18/8108; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |