Patent US5398023A successfully refreshed from Google Patents.
Patent US3880791A successfully refreshed from Google Patents.
US3880791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross linkable thermoplastic adhesives
Assignee: Braskem America Inc
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Filing: 1973-05-31
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Granted: 1975-04-29
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Expires: 1993-05-31
Abstract
Abstract Compositions are disclosed for makng thermoplastic adhesives and coatings. The compositions include coal tar pitch and two copolymers of ethylene in which the copolymers are cross-linked with dicumyl peroxide.
Inventors
- 👤 Arthur J Marcozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:00
CPC Classifications
C; C08; C08L; C08L95/00; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08L2666/00; C08L2666/02; C08L2666/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A COMPOSITION USEFUL FOR COATINGS COMPRISING A. ABOUT 25 TO 50 PERCENT PITCH HAVING A RING-AND-BALL SOFTENING POINT BETWEEN ABOUT 70* AND 200*C B. ABOUT 20 TO 40 PERCENT COPOLYMER OF ETHYLENE AND VINYL ACETATE IN WHICH THE ETHYLENE COMPRISES FROM 50 TO 95% BY WEIGHT C. ABOUT 20 TO 40 PERCENT COPOLYMERS OF ETHYLENE AND ACRYLIC ACID IN WHICH THE ETHYLENE COMPRISES FROM 25% TO ABOUT 99.9% BY WEIGHT, HAVING A MELT INDEX FROM ABOUT 0.1 TO ABOUT 400 AND D. ABOUT 0.5 TO 10% DICUMYL PEROXIDE.
Claim 2
Dependent Claim
88 words
A COMPOSITION USEFUL FOR COATINGS COMPRISING A. ABOUT 25 TO 50 PERCENT PITCH HAVING A RING-AND-BALL SOFTENING POINT BETWEEN ABOUT 70* AND 200*C B. ABOUT 20 TO 40 PERCENT COPOLYMER OF ETHYLENE AND VINYL ACETATE IN WHICH THE ETHYLENE COMPRISES FROM 50 TO 95% BY WEIGHT C. ABOUT 20 TO 40 PERCENT COPOLYMERS OF ETHYLENE AND ACRYLIC ACID IN WHICH THE ETHYLENE COMPRISES FROM 25% TO ABOUT 99.9% BY WEIGHT, HAVING A MELT INDEX FROM ABOUT 0.1 TO ABOUT 400 AND D. ABOUT 0.5 TO 10% DICUMYL PEROXIDE.
Claim 3
Dependent Claim
9 words
An extruded tape of the composition of claim 1.
Claim 4
Dependent Claim
20 words
Composition of claim 1 wherein the ethylene-acrylic acid copolymer contains from about 2 to about 20% acrylic acid by weight.
Claim 5
Dependent Claim
22 words
Composition of claim 1 in which the dicumyl peroxide is present in an amount from about 2 to about 5% by weight.
Claim 6
Dependent Claim
19 words
Composition of claim 1 in which the pitch has a ring-and-ball softening point between about 100* and 150* C.
References Cited (Backward Citations)
US3410928A
Cited
US3361692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |