US3267047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a polyurethane foam using a mixture of a divalent lead salt and a stannous salt as catalysts
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1960-04-27
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Granted: 1966-08-16
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 George T Gmitter
- 👤 Emery V Braidich
- 👤 Kallaur Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/161; C08G18/163; C08G18/22; C08G18/222; C08G18/225; C08G18/24; C08G18/244; C08G18/26; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08G18/42; C08G18/4244; C08G18/4247; C08G18/4252; C08G18/48; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0083; C08G2380/00; C08G2410/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF PRODUCING A POLYURETHANE FOAM WHICH COMPRISES REACTING (1) AT LEAST ONE ORGANIC POLYISOCYANATE WITH (2) AT LEAST ONE POLYOL SELECTED FROM THE GROUP CONSISTING OF A POLYETHER POLYOL, AND A MIXTURE OF A MAJOR AMOUNT OF A POLYETHER POLYOL AND A MINOR AMOUNT OF A POLYESTER POLYOL AND CONTAINING AT LEAST 2 ACTIVE HYDROXYL RADIICALS IN AMOUNTS SUFFICIENT TO FORM A POLYURETHANE IN THE PRESENCE OF (3) A MINOR AMOUNT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF POLYOL PRESENT AND SUFFICIENT TO CATALYST THE REACTION BETWEEN SAID POLYISOCYANATE AND SAID POLYOL OF A CATALYST COMPRISING A MIXTURE OF DIVALENT LEAD SALTS OF A CARBOXYLIC ACID AND A MEMBER OF THE CLASS CONSISTING OF STANNOUS OCTOATE AND STANNOUS OLEATE AND A BLOWING AGENT.
Claim 2
Independent Claim
126 words
THE METHOD OF PRODUCING A POLYURETHANE FOAM WHICH COMPRISES REACTING (1) AT LEAST ONE ORGANIC POLYISOCYANATE WITH (2) AT LEAST ONE POLYOL SELECTED FROM THE GROUP CONSISTING OF A POLYETHER POLYOL, AND A MIXTURE OF A MAJOR AMOUNT OF A POLYETHER POLYOL AND A MINOR AMOUNT OF A POLYESTER POLYOL AND CONTAINING AT LEAST 2 ACTIVE HYDROXYL RADIICALS IN AMOUNTS SUFFICIENT TO FORM A POLYURETHANE IN THE PRESENCE OF (3) A MINOR AMOUNT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF POLYOL PRESENT AND SUFFICIENT TO CATALYST THE REACTION BETWEEN SAID POLYISOCYANATE AND SAID POLYOL OF A CATALYST COMPRISING A MIXTURE OF DIVALENT LEAD SALTS OF A CARBOXYLIC ACID AND A MEMBER OF THE CLASS CONSISTING OF STANNOUS OCTOATE AND STANNOUS OLEATE AND A BLOWING AGENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |