US2761852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic polyureas
Assignee: Bayer AG
•
Filing: 1951-07-24
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Granted: 1956-09-04
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Expires: 1971-07-24
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Wolfgang
- 👤 Rinke Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:49
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/5264; D06P1/5285; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/282; C08G18/30; C08G18/32; C08G18/3225; C08G18/3228; C08L; C08L75/00; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A POLYUREA OBTAINED BY REACTING IN A MONOHYDRIC LOWER ALIPHATIC ALCOHOL, A MIXTURE OF DIETHYLENE TRIAMINE AND GAMMA, GAMMA-DIAMINOPROPYLMETHYLAMINE WITH ABOUT EQUIMOLECULAR PROPORTIONS OF HEXAMETHYLENE DIISOCYANATE.
Claim 2
Dependent Claim
22 words
AN AQUEOUS TEXTILLE PRINTING PASTE COMPRISING A PIGMENT AND AS A BINDER THE ACETIC ACID SALT OF THE POLYMER OF CLAIM 9.
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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |