US3075928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of flame-resistant urethane foams
Assignee: Union Carbide Corp
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Filing: 1960-07-26
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Granted: 1963-01-29
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Expires: 1980-07-26
Abstract
No abstract record available.
Inventors
- 👤 William M Lanham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4879; C08J9/0095; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; C08J2375/00; C08J2375/04; C08J2375/08; C08J2427/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE PREPARATION OF FLANE-RESISTANT POLYURETHANE FOAMS WHICH COMPRISES REACTING A POLYETHER PREPARED BY THE ADDITION OF ALKYLENE OXIDE TO A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYOL AND POLYAMINE HAVING AT LEAST TWO ACTIVE HYDROGENS AND A MOLECULAR WEIGHT RANGING FROM ABOUT 250 TO 1500 WITH AN ORGANI POLYISOCYANATE IN THE PRESENCE OF A FOAMING AGENT AND FROM 3.0 TO 6.0 PERCENT BY WEIGHT ANTIMONY DTRIOXIDE AND FROM 4.0 TO 8.0 PERCENT BY WEIGHT OF A VINYL CHLORIDE RESIN HAVING A REDUCED VISCOSITY RANGING FROM 0.1 TO 10.0.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE PREPARATION OF FLANE-RESISTANT POLYURETHANE FOAMS WHICH COMPRISES REACTING A POLYETHER PREPARED BY THE ADDITION OF ALKYLENE OXIDE TO A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYOL AND POLYAMINE HAVING AT LEAST TWO ACTIVE HYDROGENS AND A MOLECULAR WEIGHT RANGING FROM ABOUT 250 TO 1500 WITH AN ORGANI POLYISOCYANATE IN THE PRESENCE OF A FOAMING AGENT AND FROM 3.0 TO 6.0 PERCENT BY WEIGHT ANTIMONY DTRIOXIDE AND FROM 4.0 TO 8.0 PERCENT BY WEIGHT OF A VINYL CHLORIDE RESIN HAVING A REDUCED VISCOSITY RANGING FROM 0.1 TO 10.0.
References Cited (Backward Citations)
US2634244A
Cited
US2955056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |