US2951823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyesters of unsaturated alpha, beta-dicarboxylic acids and polyvalent alcohols
Assignee: Rain Carbon Germany GmbH
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Filing: 1957-02-04
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Granted: 1960-09-06
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Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Sauer Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:13
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AS A NEW RESINOUS PRODUCT, AN UNSATURATED POLYESTER HAVING AN ACID NUMBER OF 2-22 AND COMPRISING THE REACTION PRODUCT OF (A) A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF A,B ETHYLENICALLY UNSATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES, (B) ENDOMETHYLENETETRAHYDROPHTHALYL ALCOHOL, AND (C) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES, AND UNSUBSTITUTED ALIPHATIC GLYCOLS, THE MOLAR PROPORTION BETWEEN SAID UNSATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES AND SAID SATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES BEING IN THE RANGE OF 1:0 TO 1:1 AND THE MOLAR PROPORTION BETWEEN THE ENDOMETHYLENETETRAHYDROPHTHALYL-ALCOHOL AND SAID GLYCOLS BEING IN THE RANGE OF 1:0 TO 1:3.5, THE MOLAR PROPORTION OF THE TOTAL ACIDS TO THE TOTAL ALCOHOLS BEING IN THE RANGE OF 1:1.1 TO 1:1.6.
Claim 2
Dependent Claim
125 words
AS A NEW RESINOUS PRODUCT, AN UNSATURATED POLYESTER HAVING AN ACID NUMBER OF 2-22 AND COMPRISING THE REACTION PRODUCT OF (A) A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF A,B ETHYLENICALLY UNSATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES, (B) ENDOMETHYLENETETRAHYDROPHTHALYL ALCOHOL, AND (C) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES, AND UNSUBSTITUTED ALIPHATIC GLYCOLS, THE MOLAR PROPORTION BETWEEN SAID UNSATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES AND SAID SATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES BEING IN THE RANGE OF 1:0 TO 1:1 AND THE MOLAR PROPORTION BETWEEN THE ENDOMETHYLENETETRAHYDROPHTHALYL-ALCOHOL AND SAID GLYCOLS BEING IN THE RANGE OF 1:0 TO 1:3.5, THE MOLAR PROPORTION OF THE TOTAL ACIDS TO THE TOTAL ALCOHOLS BEING IN THE RANGE OF 1:1.1 TO 1:1.6.
References Cited (Backward Citations)
US2557136A
Cited
US2736730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |