US2824080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixtures of hydroxy phenones and esters of salicylic acid in resins as inhibitors of discoloration by light
Assignee: PPG Industries Inc
•
Filing: 1954-03-01
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Granted: 1958-02-18
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Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Elmer H Haux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A HARD, RESINOUS PRODUCT CHARACTERIZED BY OUTSTANDING RESISTANCE TO THE HARMFUL EFFECTS OF LIGHT, COMPRISING AN INTERPOLYMER OF (A) A POLYESTER OF A DIHYDRIC ALCOHOL AND AN ALPHA, BETA-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, AND (B) A MONOMER CONTAINING A CH2=C<GROUP SAID INTERPOLYMER HAVING INCORPORATED THEREIN (1) AN ESTER OF SALICYLIC ACID WHEREIN THE SALICYLIC ACID IS ESTERIFIED THROUGH THE CARBONYL GROUP AND (2) A HYDROXY SUBSTITUTED PHENONE IN WHICH A HYDROXYL GROUP IS IN THE ORTHO POSITION TO THE KETONIC CARBONYL GROUP OF THE PHENONE.
Claim 2
Dependent Claim
84 words
A HARD, RESINOUS PRODUCT CHARACTERIZED BY OUTSTANDING RESISTANCE TO THE HARMFUL EFFECTS OF LIGHT, COMPRISING AN INTERPOLYMER OF (A) A POLYESTER OF A DIHYDRIC ALCOHOL AND AN ALPHA, BETA-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, AND (B) A MONOMER CONTAINING A CH2=C<GROUP SAID INTERPOLYMER HAVING INCORPORATED THEREIN (1) AN ESTER OF SALICYLIC ACID WHEREIN THE SALICYLIC ACID IS ESTERIFIED THROUGH THE CARBONYL GROUP AND (2) A HYDROXY SUBSTITUTED PHENONE IN WHICH A HYDROXYL GROUP IS IN THE ORTHO POSITION TO THE KETONIC CARBONYL GROUP OF THE PHENONE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |