US3036022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyurethane foams
Assignee: Heyden Newport Chemical Corp
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Filing: 1961-03-31
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Granted: 1962-05-22
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 William J Stewart
- 👤 Theodore A Girard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
IN THE PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAMS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE, WATER, AND A POLYHYDRIC POLYALKYLENE POLYETHER, SAID ETHER CONTAINING FROM 2 TO 8 SECONDARY ALCOHOL GROUPS PER MOLECULE AND HAVING A MOLECULAR WEIGHT BETWEEN 500 AND 6000, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE REACTION MIXTURE A CATALYTIC AMOUNT OF STANNOUS QUINOLINOLATE.
References Cited (Backward Citations)
US2948691A
Cited
FR1212252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |