US3361692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene/vinyl acetate copolymer and coal tar pitch or petroleum pitch composition
Assignee: United States Steel Corp
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Filing: 1963-09-03
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Granted: 1968-01-02
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Robert E Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L95/00; C22; C22C; C22C38/00; C22C38/04; C22C38/18; C22C38/40; C22C38/44; C22C38/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A COMPOSITION COMPRISING FROM ABOUT 0.1% TO ABOUT 75% BY WEIGHT OF THE COMPOSITION OF A PITCH OF THE CLASS CONSISTING OF COAL TAR PITCH AND PETROLEUM PITCH HAVING A RING-AND-BALL SOFTENING POINT FROM ABOUT 40*C. TO ABOUT 190*C. IN ADMIXTURE WITH FROM ABOUT 99.9% TO ABOUT 25% BY WEIGHT OF A RESIN COMPRISING A COPOLYMER OF ETHYLENE AND VINYL ACETATE, SAID COPOLYMER HAVING A VINYL ACETATE CONTENT BETWEEN 5% AND 50% BY WEIGHT AND SAID COPOLYMER HAVING A MELT INDEX FROM ABOUT 0.2 TO ABOVE ABOUT 1000, AND THE RESPECTIVE SOFTENING POINTS OF SAID PITCH AND RESIN BEING WITHIN A RANGE OF ABOUT 80*C.
Claim 2
Dependent Claim
105 words
A COMPOSITION COMPRISING FROM ABOUT 0.1% TO ABOUT 75% BY WEIGHT OF THE COMPOSITION OF A PITCH OF THE CLASS CONSISTING OF COAL TAR PITCH AND PETROLEUM PITCH HAVING A RING-AND-BALL SOFTENING POINT FROM ABOUT 40*C. TO ABOUT 190*C. IN ADMIXTURE WITH FROM ABOUT 99.9% TO ABOUT 25% BY WEIGHT OF A RESIN COMPRISING A COPOLYMER OF ETHYLENE AND VINYL ACETATE, SAID COPOLYMER HAVING A VINYL ACETATE CONTENT BETWEEN 5% AND 50% BY WEIGHT AND SAID COPOLYMER HAVING A MELT INDEX FROM ABOUT 0.2 TO ABOVE ABOUT 1000, AND THE RESPECTIVE SOFTENING POINTS OF SAID PITCH AND RESIN BEING WITHIN A RANGE OF ABOUT 80*C.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |