US3369925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing leather substitutes and a product of the same
Assignee: Toyo Tire Corp
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Filing: 1965-03-19
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Granted: 1968-02-20
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Matsushita Hideo
- 👤 Fukada Kazuo
- 👤 Nitta Mamoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; D; D06; D06N; D06N3/00; D06N3/12; D06N3/125; D06N3/14; D06N3/142; D06N3/143; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/31504; Y10T428/31971
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF MANUFACTURING LEATHER SUBSTITUTES, WHICH COMPRISES PREPARING A COLLOIDAL COATING MIXTURE BY ADMIXING A 5 TO 50 PERCENT SOLUTION OF AN ELASTOMER SELECTED FROM THE GROUP CONSISTING OF POLYURETHANE-UREA, POLYUREA AND POLYURETHANE, THE SOLVENT FOR THE POLYMER BEING MISCIBLE WITH AN ALCOHOL AND WATER AND BEING NONSOLVENT FOR POLYAMIDE, WITH A 5 TO 25 PERCENT ALCOHOLIC SOLUTION OF A POLYAMIDE IN THE DRY WEIGHT RATIO OF 1:1/20 TO 1, COATING THE OBTAINED COLLOIDAL ASMIXTURE ONTO A FIBROUS SUBSTRATE, AND SUBSEQUENTLY TREATING THE COATED SUBSTRATE BY IMMERSING IN WATER TO FORM A PRODUCT HAVING A MICROPOROUS COATING.
Claim 2
Independent Claim
98 words
A METHOD OF MANUFACTURING LEATHER SUBSTITUTES, WHICH COMPRISES PREPARING A COLLOIDAL COATING MIXTURE BY ADMIXING A 5 TO 50 PERCENT SOLUTION OF AN ELASTOMER SELECTED FROM THE GROUP CONSISTING OF POLYURETHANE-UREA, POLYUREA AND POLYURETHANE, THE SOLVENT FOR THE POLYMER BEING MISCIBLE WITH AN ALCOHOL AND WATER AND BEING NONSOLVENT FOR POLYAMIDE, WITH A 5 TO 25 PERCENT ALCOHOLIC SOLUTION OF A POLYAMIDE IN THE DRY WEIGHT RATIO OF 1:1/20 TO 1, COATING THE OBTAINED COLLOIDAL ASMIXTURE ONTO A FIBROUS SUBSTRATE, AND SUBSEQUENTLY TREATING THE COATED SUBSTRATE BY IMMERSING IN WATER TO FORM A PRODUCT HAVING A MICROPOROUS COATING.
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |