US2812337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paints and methods of manufacturing same
Assignee: Willy Spangenberg & Co
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Filing: 1952-01-16
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Granted: 1957-11-05
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Expires: 1972-01-16
Abstract
No abstract record available.
Inventors
- 👤 Culemeyer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE PROCESS MANUFACTURING A DRYING PAINT BASE, WHICH COMPRISES ESTERIFYING SUBSTANTIALLY PURE TALL OIL FATTY ACIDS WITH A POLYHYDRIC ALCOHOL TO PRODUCE A POLYHYDRIC ALCOHOL ESTER PRODUCT WHICH CONTAINS LESS THAN ONE FREE HYDROXYL GROUP TO ONE ESTER MOLECULE AND HAVING A HYDROXYL NUMBER WITHIN THE APPROXIMATE RANGE OF 5 TO 65, AND REACTING THE ESTER PRODUCT WITH A POLYISCOYANATE IN AN AMOUNT LESS THAN THAT CORRESPONDING TO THE STOICHIOMETRIC RELATIONSHIP OF ONE MOLECULE OF THE POLYISOCYANATE TO TWO ESTER MOLECULES AND IN SUFFICIENT QUANTITY TO PROVIDE ISOCYANATE GROUPS SUBSTANTIALLY CORRESPONDING WITH THE NUMBER OF FREE HYDROXYL GROUPS IN THE ESTER PRODUCT.
Claim 2
Dependent Claim
102 words
THE PROCESS MANUFACTURING A DRYING PAINT BASE, WHICH COMPRISES ESTERIFYING SUBSTANTIALLY PURE TALL OIL FATTY ACIDS WITH A POLYHYDRIC ALCOHOL TO PRODUCE A POLYHYDRIC ALCOHOL ESTER PRODUCT WHICH CONTAINS LESS THAN ONE FREE HYDROXYL GROUP TO ONE ESTER MOLECULE AND HAVING A HYDROXYL NUMBER WITHIN THE APPROXIMATE RANGE OF 5 TO 65, AND REACTING THE ESTER PRODUCT WITH A POLYISCOYANATE IN AN AMOUNT LESS THAN THAT CORRESPONDING TO THE STOICHIOMETRIC RELATIONSHIP OF ONE MOLECULE OF THE POLYISOCYANATE TO TWO ESTER MOLECULES AND IN SUFFICIENT QUANTITY TO PROVIDE ISOCYANATE GROUPS SUBSTANTIALLY CORRESPONDING WITH THE NUMBER OF FREE HYDROXYL GROUPS IN THE ESTER PRODUCT.
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |