Patent US3214397A successfully refreshed from Google Patents.
US3214397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing stabilized polyurethane foam compositions
Assignee: Union Carbide Corp
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Filing: 1964-07-20
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Granted: 1965-10-26
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0033; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD FOR THE PRODUCTION OF POLYURETHANE FOAMS WHICH COMPRISES REACTING A POLYETHER POLYOL WITH AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A TERTIARY AMINE, A BLOWING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER, VAPORIZABLE HALOCARBONS, AND MIXTURES THEREOF, AND A STABLIZING AMOUNT OF PHENOTHIAZINE.
Claim 2
Independent Claim
46 words
A METHOD FOR THE PRODUCTION OF POLYURETHANE FOAMS WHICH COMPRISES REACTING A POLYETHER POLYOL WITH AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A TERTIARY AMINE, A BLOWING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER, VAPORIZABLE HALOCARBONS, AND MIXTURES THEREOF, AND A STABLIZING AMOUNT OF PHENOTHIAZINE.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |