Patent US3134742A successfully refreshed from Google Patents.
US3134742A
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Flame retardant polyurethane foams
Assignee: PPG Industries Inc
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Filing: 1960-05-17
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Granted: 1964-05-26
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Expires: 1980-05-17
Abstract
No abstract record available.
Inventors
- 👤 Wismer Marco
- 👤 Bras Louis R Le
- 👤 John R Peffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6461; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C08G18/48; C08G18/50; C08G18/5075; C08K; C08K5/00; C08K5/49; C08K5/5399
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A FLAME RETARDANT CELLULAR POLYURETHANE RESIN WHICH IS FORMED FROM A MIXTURE COMPRISING: (A) AN ORGANIC POLYISOCYANATE; (B) A POLYOL CONSISTING ESSENTIALLY OF CARBON, HYDROGEN AND OXYGEN, THE REACTIVE GROUPS OF SAID POLYOL BEING HYDROXYL GROUPS; (C) A POLYOL WHICH IS A HYDROXYALKYL ESTER OF AN OXYACID OF PENTAVALENT PHOSPHORUS; (D) A POLYAMIDE OF AN OXYACID OF PHOSPHORUS, SAID POLYAMIDE CONTAINING NITROGEN AND PHOSPHORUS PRESENT IN THE GROUP
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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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |