US3967651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesives coatings and laminates utilizing ethylene copolymers and coal-tar pitch
Assignee: ROSENBERG DAVID E 930 OSAGE ROAD PITTSBURGH PENNSYLVANIA 15243
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Filing: 1974-01-30
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Granted: 1976-07-06
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Expires: 1994-01-30
Abstract
Abstract Thermoplastic compositions of matter comprising coal-tar pitch and a material selected from (1) a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid and (2) a mixture of copolymers of ethylene and vinyl acetate and of ethylene and an ethylenically-unsaturated carboxylic acid, exhibiting high strength in shear and peel over a wide temperature range, are prepared and used as adhesives and coatings. Laminated materials utilizing such compositions of matter are also disclosed.
Inventors
- 👤 George F. Snyder
- 👤 Robert M. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:16
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/16; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C; C08; C08L; C08L95/00; C09; C09D; C09D131/00; C09D131/02; C09D131/04; C09D133/00; C09D133/02; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0846; C09J123/0853; C09J123/0869; C09J131/00; C09J131/02; C09J131/04; C09J133/00; C09J133/02; C09J195/00; F16L57/00; F16L57/06; F16L58/04; F16L58/10; F16L58/12; C08L2205/00; C08L2205/02; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/0869; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
A coated culvert pipe comprising a steel substrate bonded to a 10 - 30 mil thick protective film of a composition comprising: a. from about 10 to about 75 weight percent coal-tar pitch; b. from about 25 to about 90 weight percent of a polymeric ethylene composition selected from the group consisting of
Claim 2
Dependent Claim
53 words
A coated culvert pipe comprising a steel substrate bonded to a 10 - 30 mil thick protective film of a composition comprising: a. from about 10 to about 75 weight percent coal-tar pitch; b. from about 25 to about 90 weight percent of a polymeric ethylene composition selected from the group consisting of
Claim 3
Dependent Claim
67 words
a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms, and 2. a mixture of copolymers of ethylene and vinyl acetate and ethylene and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms wherein the ethylene-vinyl acetate copolymer and the ethylene-carboxylic acid copolymer each comprise from about 5 to about 85 weight percent of the total composition.
Claim 4
Dependent Claim
67 words
a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms, and 2. a mixture of copolymers of ethylene and vinyl acetate and ethylene and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms wherein the ethylene-vinyl acetate copolymer and the ethylene-carboxylic acid copolymer each comprise from about 5 to about 85 weight percent of the total composition.
Claim 5
Dependent Claim
19 words
The coated culvert of claim 1 wherein the protective film is from about 15 to about 20 mils thick.
Claim 6
Dependent Claim
152 words
A coated pipe comprising, a. a metallic pipe overwrapped with b. a 10 - 50 mil thick film of a composition comprising: i. from about 10 to about 75 weight percent coal-tar pitch; ii. from about 25 to about 90 weight percent of a polymeric ethylene composition selected from the group consisting of 1. a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms, and 2. a mixture of copolymers of ethylene and vinyl acetate and ethylene and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms wherein the ethylene-vinyl acetate copolymer and the ethylene-carboxylic acid copolymer each comprise from about 5 to about 85 weight percent of the total composition which in turn is overwrapped by c. a protective layer to provide pre-service protection to the coated pipe, said protective layer selected from paper, resin impregnated paper, felt, or glass fiber.
Claim 7
Dependent Claim
152 words
A coated pipe comprising, a. a metallic pipe overwrapped with b. a 10 - 50 mil thick film of a composition comprising: i. from about 10 to about 75 weight percent coal-tar pitch; ii. from about 25 to about 90 weight percent of a polymeric ethylene composition selected from the group consisting of 1. a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms, and 2. a mixture of copolymers of ethylene and vinyl acetate and ethylene and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms wherein the ethylene-vinyl acetate copolymer and the ethylene-carboxylic acid copolymer each comprise from about 5 to about 85 weight percent of the total composition which in turn is overwrapped by c. a protective layer to provide pre-service protection to the coated pipe, said protective layer selected from paper, resin impregnated paper, felt, or glass fiber.
Claim 8
Dependent Claim
130 words
A coated pipe comprising a metallic pipe coated with a layer of coal-tar enamel overwrapped with a protective tape comprising a 10 - 50 mil thick sheet of a composition comprising: a. from about 10 to about 75 weight percent coal-tar pitch; b. from about 25 to about 90 weight percent of a polymeric ethylene composition selected from the group consisting of 1. a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms, and 2. a mixture of copolymers of ethylene and vinyl acetate and ethylene and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms wherein the ethylene-vinyl acetate copolymer and the ethylene-carboxylic acid copolymer each comprise from about 5 to about 85 weight percent of the total composition.
Claim 9
Dependent Claim
130 words
A coated pipe comprising a metallic pipe coated with a layer of coal-tar enamel overwrapped with a protective tape comprising a 10 - 50 mil thick sheet of a composition comprising: a. from about 10 to about 75 weight percent coal-tar pitch; b. from about 25 to about 90 weight percent of a polymeric ethylene composition selected from the group consisting of 1. a terpolymer of ethylene, vinyl acetate, and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms, and 2. a mixture of copolymers of ethylene and vinyl acetate and ethylene and an ethylenically-unsaturated carboxylic acid containing from 3 to 8 carbon atoms wherein the ethylene-vinyl acetate copolymer and the ethylene-carboxylic acid copolymer each comprise from about 5 to about 85 weight percent of the total composition.
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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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |