Patent US3245940A successfully refreshed from Google Patents.
US3245940A
Expired / Lapsed
US
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Fire retardant epoxy resins with esters of orthophosphoric or pyrophosphoric acid and an epoxide
Assignee: Richardson Co
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Filing: 1961-09-13
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Granted: 1966-04-12
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Expires: 1981-09-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Ronay
- 👤 Robert D Dexheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A HARD INFUSIBLE RESINOUS PRODUCT CHARACTERIZED BY ENHANCED FLAME RESISTANCE COMPRISING THE REACTION PRODUCT OF A POLYGLYCIDYL ETHER, A CURING AGENT FOR SAID ETHER SELECTED FROM THE CLASS CONSISTING OF AMINES, POLYCARBOXYLIC ACIDS, AND ACID ANHYDRIDES AND BETWEEN ABOUT 1 TO 15 PERCENT BY WEIGHT OF SAID ETHER OF THE REACTION PRODUCT OF ORTHOPHOSPHORIC ACID AND AN ALKYLENE OXIDE IN THE MOLAR RATIO RANGE OF APPROXIMATELY 1:3 TO 1:9.
Claim 2
Dependent Claim
69 words
A HARD INFUSIBLE RESINOUS PRODUCT CHARACTERIZED BY ENHANCED FLAME RESISTANCE COMPRISING THE REACTION PRODUCT OF A POLYGLYCIDYL ETHER, A CURING AGENT FOR SAID ETHER SELECTED FROM THE CLASS CONSISTING OF AMINES, POLYCARBOXYLIC ACIDS, AND ACID ANHYDRIDES AND BETWEEN ABOUT 1 TO 15 PERCENT BY WEIGHT OF SAID ETHER OF THE REACTION PRODUCT OF ORTHOPHOSPHORIC ACID AND AN ALKYLENE OXIDE IN THE MOLAR RATIO RANGE OF APPROXIMATELY 1:3 TO 1:9.
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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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |