US3008928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of sulfonamides to accelerate esterification and polycondensation reactions in the manufacture of polyester and alkyd resins
Assignee: Tennessee Corp
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Filing: 1958-07-03
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Granted: 1961-11-14
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 Walter H C Rueggeberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/87; C08G63/68; C08G63/688; C08G63/6884
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN THE MANUFACTURE OF POLYESTER AND ALKYD RESINS BY ESTERIFICATION AND POLYCONDENSATION OF DICARBOXYLIC MATERIAL WITH POLYFUNCTIONAL ALIPHATIC ALCOHOLS FREE OF FUNCTIONAL GROUPS OTHER THAN ALCOHOLIC HYDROXYL, THE STEPS OF HEATING SAID ALCOHOL AND SAID DICARBOXYLIC MATERIAL AT A TEMPERATURE BETWEEN ABOUT 175*C. AND 265*C. TO REACT THE HYDROXYL AND CARBOXYL GROUPS WITH RESULTANT ESTERIFICATION AND POLYCONDENSATION, SAID DICARBOXYLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF A SULFONAMIDE, MIXTURES THEREOF WITH 1,3-DICARBOXYBENZENE, AND MIXTURES THEREOF WITH THE ANHYDRIDE OF 1,2-DICARBOXYBENZENE, SAID SULFONAMIDE HAVING THE FORMULA
Claim 2
Dependent Claim
85 words
IN THE MANUFACTURE OF POLYESTER AND ALKYD RESINS BY ESTERIFICATION AND POLYCONDENSATION OF DICARBOXYLIC MATERIAL WITH POLYFUNCTIONAL ALIPHATIC ALCOHOLS FREE OF FUNCTIONAL GROUPS OTHER THAN ALCOHOLIC HYDROXYL, THE STEPS OF HEATING SAID ALCOHOL AND SAID DICARBOXYLIC MATERIAL AT A TEMPERATURE BETWEEN ABOUT 175*C. AND 265*C. TO REACT THE HYDROXYL AND CARBOXYL GROUPS WITH RESULTANT ESTERIFICATION AND POLYCONDENSATION, SAID DICARBOXYLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF A SULFONAMIDE, MIXTURES THEREOF WITH 1,3-DICARBOXYBENZENE, AND MIXTURES THEREOF WITH THE ANHYDRIDE OF 1,2-DICARBOXYBENZENE, SAID SULFONAMIDE HAVING THE FORMULA
References Cited (Backward Citations)
US1935264A
Cited
US2138934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |