US3027399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized prepolymers
Assignee: Bayer AG
•
Filing: 1958-08-07
•
Granted: 1962-03-27
•
Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08K; C08K5/00; C08K5/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A STABELIZED PEROLYMER OF A POLYUREETHANE, SAID PREPOLYMER HAVING URETHANE LINKAGE AND AT LEAST TWO -NCO GROUPS AND CONTAINING AS THE STABILIZER A NONBASIC ORGANO BORON COMPOUND HAVING AT LEAST ONE BORON TO CARBON BOND AND BEING FREE FROM GROUPS REACTIVE WITH AN -NCO GROUP.
Claim 2
Dependent Claim
45 words
A STABELIZED PEROLYMER OF A POLYUREETHANE, SAID PREPOLYMER HAVING URETHANE LINKAGE AND AT LEAST TWO -NCO GROUPS AND CONTAINING AS THE STABILIZER A NONBASIC ORGANO BORON COMPOUND HAVING AT LEAST ONE BORON TO CARBON BOND AND BEING FREE FROM GROUPS REACTIVE WITH AN -NCO GROUP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |