US3124544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing cellular poly-
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:02
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0033; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/288; C08G18/30; C08G18/38; C08G18/3855; C08G18/3876; C08K; C08K5/00; C08K5/36; C08K5/37; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE METHOD FOR PREPARING POLYURETHANES WHEREIN A POLYETHER POLYOL HAVING A MOLECLAR WEIGHT OF AT LEAST 250 AND CONTAINING AT LEAST TWO ACTIVE HYDROGENS AS MEASURED AND DETERMINED BY THE ZEREWITINOFF METHOD IS REACTED WITH AN ORGANIC POLYISOCYANATE IN ADMIXING WITH AN ORGANIC TIN CATALYST AND A BLOWING AGENT TO FORM A POLYURETHANE FOAM, THE IMPROVEMENT WHICH COMPRISES INCORPORATING INTO THE REACTION MIXTURE A MINOR AMOUNT OF A MERCAPTAN COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
74 words
IN THE METHOD FOR PREPARING POLYURETHANES WHEREIN A POLYETHER POLYOL HAVING A MOLECLAR WEIGHT OF AT LEAST 250 AND CONTAINING AT LEAST TWO ACTIVE HYDROGENS AS MEASURED AND DETERMINED BY THE ZEREWITINOFF METHOD IS REACTED WITH AN ORGANIC POLYISOCYANATE IN ADMIXING WITH AN ORGANIC TIN CATALYST AND A BLOWING AGENT TO FORM A POLYURETHANE FOAM, THE IMPROVEMENT WHICH COMPRISES INCORPORATING INTO THE REACTION MIXTURE A MINOR AMOUNT OF A MERCAPTAN COMPOUND OF THE FORMULA
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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |