Patent US2686771A successfully refreshed from Google Patents.
US2686771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-modified ether resins
Assignee: Sherwin Williams Co
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Filing: 1950-12-23
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Granted: 1954-08-17
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Expires: 1970-12-23
Abstract
No abstract record available.
Inventors
- 👤 Lynwood N Whitehill
- 👤 Robert S Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:39
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1488
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN THE MANUFACTURE OF A RESINOUS PRODUCT OF THE ETHER TYPE BY CONDENSATION OF A DIHYDRIC PHENOL AND A DIFUNCTIONAL HALOHYDRIN IN ALKALINE MEDIA WHEREIN THE MOLAR RATIO OF SAID PHENOL TO SAID HALOHYDRIN IS WITHIN THE RATIOS OF 1:1.1 TO 1:15, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE RESINOUS PHASE SUBSEQUENT TO THE ROMOVAL OF WATER-SOLUBLE SALTS AND PRIOR TO THE FINAL REMOVAL OF VOLATILES THEREFROM BY DISTILLATION, A CATALYTIC QUANTITY BUT NOT MORE THAN 1.25% BASED ON THE HALOHYDRIN CONTENT OF SAID RESIN FORMING CONSTITUENTS OF AN ACID-REACTIVE PHOSPHOROUS-CONTAINING COMPOUND EXCLUSIVE OF THE INORGANIC SALTS OF PHOSPHORUS.
Claim 2
Dependent Claim
99 words
IN THE MANUFACTURE OF A RESINOUS PRODUCT OF THE ETHER TYPE BY CONDENSATION OF A DIHYDRIC PHENOL AND A DIFUNCTIONAL HALOHYDRIN IN ALKALINE MEDIA WHEREIN THE MOLAR RATIO OF SAID PHENOL TO SAID HALOHYDRIN IS WITHIN THE RATIOS OF 1:1.1 TO 1:15, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE RESINOUS PHASE SUBSEQUENT TO THE ROMOVAL OF WATER-SOLUBLE SALTS AND PRIOR TO THE FINAL REMOVAL OF VOLATILES THEREFROM BY DISTILLATION, A CATALYTIC QUANTITY BUT NOT MORE THAN 1.25% BASED ON THE HALOHYDRIN CONTENT OF SAID RESIN FORMING CONSTITUENTS OF AN ACID-REACTIVE PHOSPHOROUS-CONTAINING COMPOUND EXCLUSIVE OF THE INORGANIC SALTS OF PHOSPHORUS.
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |