US3313744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 4-bis(3-dimethylaminopropyl)piperazine catalyst for polyurethane preparation
Assignee: Texaco Inc
•
Filing: 1962-12-03
•
Granted: 1967-04-11
•
Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Doris M Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF PRODUCING A URETHANE WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN ORGANIC HYDROXY COMPOUND IN THE PRESENCE OF A CATALYTIC QUANTITY OF 1,4-BIS(3-DIMETHYLAMINOPROPYL)PIPERAZINE, SAID ORGANIC HYDROXY COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS AND LINEAR POLYESTERS HAVING TERMINAL HYDROXYL GROUPS, WHICH POLYESTERS ARE OBTAINED FROM THE REACTION OF A POLYCARBOXYLIC ACID WITH A POLYHYDRIDE ALCOHOL.
Claim 2
Independent Claim
61 words
A METHOD OF PRODUCING A URETHANE WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN ORGANIC HYDROXY COMPOUND IN THE PRESENCE OF A CATALYTIC QUANTITY OF 1,4-BIS(3-DIMETHYLAMINOPROPYL)PIPERAZINE, SAID ORGANIC HYDROXY COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS AND LINEAR POLYESTERS HAVING TERMINAL HYDROXYL GROUPS, WHICH POLYESTERS ARE OBTAINED FROM THE REACTION OF A POLYCARBOXYLIC ACID WITH A POLYHYDRIDE ALCOHOL.
References Cited (Backward Citations)
US2762744A
Cited
US2949431A
Cited
US3084177A
Cited
DE1109882B
Cited
US3044971A
Cited
US3075927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |