US3304348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat settable butadiene-styrene compositions for protective coatings comprising phosphoric acid and a polycarboxylic acid anhydride
Assignee: WR Grace and Co
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Filing: 1963-10-25
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Granted: 1967-02-14
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Expires: 1983-10-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Svrchek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
C; C09; C09D; C09D115/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A COMPOSITION SETTABLE BY HEAT INTO AN IMPERVIOUS PROTECTIVE COATING RESISTANT TO CATHODIC DISBONDING COMPRISING A MIXTURE OF COPOLYMERS WHOSE SOLIDS CONTENT CONTAINS FROM 5 TO 40% OF A BUTADIENE-STYRENE COPOLYMER CONTAINING FROM 75 TO 85% BUTADIENE AND 15 TO 25% STYRENE AND FROM 60 TO 95% OF A PARTLY OXIDIZED BUTADIENE-STYRENE COPOLYMER CONTAINING FROM 75 TO 85% BUTADIENE AND 15 TO 25% STYRENE, IN COMBINATION WITH AN ANHYDRIDE OF A POLYCARBOXYLIC ORGANIC ACID IN AN AMOUNT UP TO ABOUT 25% BY WEIGHT OF THE SAID SOLIDS CONTENT AND PHOSPHORIC ACID IN AN AMOUNT UP TO ABOUT 2% BY WEIGHT OF SAID SOLIDS CONTENT.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |