Patent US2979484A successfully refreshed from Google Patents.
US2979484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of phenolic resins
Assignee: Walker Extract and Chemical Co Ltd
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Filing: 1955-04-28
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Granted: 1961-04-11
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Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Redfarn Cyril Aubrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:09
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A CURABLE THEROMSETTABLE COMPOSITION COMPRISING (A) A POLYESTER RESIN OF (A) AN INORGANIC ESTERIFYING AGENT SELECTED FROM THE GROUP CONSISTING OF BORIC ACID, ORTHOPHOSPHORIC ACID, META-PHOSPHORIC ACID, POLYPHOSPHORIC ACID, POLY-FUNCTIONAL CHLORINE DERIVATIVES OF SAID PHOSPHORIC ACIDS AND PHOSPHORUS TRICHLORIDE WITH (B) A SUBSTANTIAL PROPORTION OF A POLYHYDRIC PHENOL HAVING AN UNSUBSTITUTED POSITION IN THE NUCLEAUS REACTIVE WITH FORMALDEHYDE, SAID POLYESTER RESIN CONTAINING A SUBSTANTIAL PROPORTION OF UNESTERIFIED PHENOLIC HYDROXY GROUPS, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND A COMPOUND YIELDING FORMALDEHYDE UNDER CURING CONDITIONS, SAID MEMBER BEING PRESENT IN A PROPORTION SUFFICIENT TO CURE THE COMPOSITION.
Claim 2
Dependent Claim
101 words
A CURABLE THEROMSETTABLE COMPOSITION COMPRISING (A) A POLYESTER RESIN OF (A) AN INORGANIC ESTERIFYING AGENT SELECTED FROM THE GROUP CONSISTING OF BORIC ACID, ORTHOPHOSPHORIC ACID, META-PHOSPHORIC ACID, POLYPHOSPHORIC ACID, POLY-FUNCTIONAL CHLORINE DERIVATIVES OF SAID PHOSPHORIC ACIDS AND PHOSPHORUS TRICHLORIDE WITH (B) A SUBSTANTIAL PROPORTION OF A POLYHYDRIC PHENOL HAVING AN UNSUBSTITUTED POSITION IN THE NUCLEAUS REACTIVE WITH FORMALDEHYDE, SAID POLYESTER RESIN CONTAINING A SUBSTANTIAL PROPORTION OF UNESTERIFIED PHENOLIC HYDROXY GROUPS, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND A COMPOUND YIELDING FORMALDEHYDE UNDER CURING CONDITIONS, SAID MEMBER BEING PRESENT IN A PROPORTION SUFFICIENT TO CURE THE COMPOSITION.
References Cited (Backward Citations)
US2058394A
Cited
US2214769A
Cited
US2330286A
Cited
US2437710A
Cited
US2414415A
Cited
US2606888A
Cited
US2636876A
Cited
US2606887A
Cited
US2703792A
Cited
US2605248A
Cited
US2623866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |