Patent US2655487A successfully refreshed from Google Patents.
US2655487A
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Tetrahydrophthalic acid half ester compounds
Assignee: FRED K A STRESEN REUTER Inc
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Filing: 1950-09-27
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Granted: 1953-10-13
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Expires: 1970-09-27
Abstract
No abstract record available.
Inventors
- 👤 Alexander C Keyl
- 👤 Robert H Geils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:40
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
THE METHOD OF FORMING AN ALKYD RESIN COMPRISING DISSOLVING A TETRAHYDROPHTHALIC ACID HALFESTER OF A 12 TO 22 CARBON ATOM FATTY ACID MONOESTER OF A POLYHYDROXY ALIPHATIC ALCOHOL HAVING AT LEAST ONE FREE HYDROXYL GROUP AND ONE FREE CARBOXYL GROUP IN A SOLVENT AND HEATING THE SOLUTION AND THEREBY AZEOTROPICALLY DISTILLING SAID SOLVENT AND WATER OF CONDENSATION FROM THE SOLUTION.
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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |