US3245958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of an isocyanate with an active hydrogen compound using an antimony carboxylate catalyst
Assignee: Hooker Chemical Corp
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Filing: 1965-05-04
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Granted: 1966-04-12
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Hindersinn
- 👤 Stephen M Creighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/90; C07F9/902; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/227; C08G63/00; C08G63/78; C08G63/82; C08G63/85
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
THE PROCESS WHICH COMPRISES REACTING TOGETHER AN ORGANIC POLYISOCYANATE, AND A HYDROXYL-CONTAINING POLYMER HAVING A HYDROXYL NUMBER OF ABOUT 25 TO 900, IN A RATIO TO PROVIDE ABOUT 85 TO 115 PERCENT OF ISOCYANATE GROUPS WITH RESPECT TO THE TOTAL NUMBER OF HYDROXYL, CARBOXYL AND EQUIVALENT GROUPS PRESENT IN THE HYDROXYLCONTAINING POLYMER, SAID REACTION BEING PERFORMED IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ANTIMONY CARBOXYLATE OF THE FORMULA
References Cited (Backward Citations)
US2865869A
Cited
US3061557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |