US3320190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes preparation utilizing piperidine compounds as catalysts
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1966-01-27
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Granted: 1967-05-16
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Expires: 1986-01-27
Abstract
No abstract record available.
Inventors
- 👤 Allport Dennis Charlton
- 👤 Gamlen George Albert
- 👤 Corran John Anthony
- 👤 Eaton David Crawford
- 👤 Twitchett Harry James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/10; C07D211/14; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR THE MANUFACTURE OF POLYURETHANE MATERIALS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN ORGANIC POLYHYDROXY COMPOUND IN THE PRESENCE OF A CATALYTIC AMOUNT OF A TERTIARY AMINE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
34 words
A PROCESS FOR THE MANUFACTURE OF POLYURETHANE MATERIALS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN ORGANIC POLYHYDROXY COMPOUND IN THE PRESENCE OF A CATALYTIC AMOUNT OF A TERTIARY AMINE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US3109825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |