Patent US5239179A successfully refreshed from Google Patents.
US4002791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt coated with polyurethane composition containing cellulosic particles
Assignee: Goodyear Tire and Rubber Co
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Filing: 1976-02-17
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Granted: 1977-01-11
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Expires: 1996-02-17
Abstract
Abstract A woven fabric belt having a coating of polyurethane on each face and extending through the interstices of the fabric. The polyurethane is the reaction product of a polypropylene ether glycol of 4,4'-methylene di(cyclohexylene isocyanate) cured with p,p'-methylene dianiline and having at least one face of said belt covered with the polyurethane having walnut shell powder incorporated therein.
Inventors
- 👤 John M. Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:26
CPC Classifications
F; F16; F16G; F16G1/00; F16G1/14; C; C09; C09D; C09D175/00; C09D175/04; C09D175/06; D; D06; D06N; D06N3/00; D06N3/0056; D06N3/0061; D06N3/12; D06N3/14; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2049; Y10T442/2057; Y10T442/2074; Y10T442/2549
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A woven fabric belt having a coating of polyurethane on each face and extending through interstices of the fabric, the polyurethane comprising the reaction product of a polypropylene ether glycol, 4,4'-methylene di(cyclohexylene isocyanate) cured with p,p'-methylene dianiline and at least one face of said belt contains said polyurethane having walnut shell powder incorporated therein.
Claim 2
Dependent Claim
54 words
A woven fabric belt having a coating of polyurethane on each face and extending through interstices of the fabric, the polyurethane comprising the reaction product of a polypropylene ether glycol, 4,4'-methylene di(cyclohexylene isocyanate) cured with p,p'-methylene dianiline and at least one face of said belt contains said polyurethane having walnut shell powder incorporated therein.
Claim 3
Dependent Claim
21 words
The woven fabric belt of claim 1 wherein the shell powder is 5 to 15 percent by weight of the polyurethane.
Claim 4
Dependent Claim
50 words
The woven fabric belt of claim 1 wherein the polyurethane comprises the reaction product of a mol of a polypropylene ether glycol with 1.5 to 2.5 mols of 4,4'-methylene di(cyclohexylene isocyanate) with sufficient p,p'-methylene dianiline to be equivalent to 87 to 98 percent free NCO content relative to the glycol.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |