Patent US3745041A successfully refreshed from Google Patents.
US3745041A
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Composition and method for surfacing leathers and leather substitutes based on filled polyurethane latex
Assignee: 3M Co
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Filing: 1971-02-11
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Granted: 1973-07-10
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Expires: 1991-02-11
Abstract
Abstract FORMATION OF LEATHER-LIKE SURFACE FROM COATING COMPOSITIONS COMPRISING AQUEOUS DISPERSION OF POLYURETHANE LATEX CONTAINING 10 TO 50 PERCENT BY WEIGHT OF A TOUGH, FLEXIBLE ORGANIC PARTICULATE FILLER SUCH AS LEATHER DUST, ORGANIC SPHEROIDS, OR THE LIKE, HAVING AN AVERAGE DIAMETER OF 10 TO 75 MICRONS, THE SLURRY HAVING A MAYONNAISE-LIKE CONSISTENCY AND A VISCOSITY OF ABOUT 30 TO 2500 POISE AND BEING SUITABLE FOR COATING OF SUBSTRATES SUCH AS IMPERFECT LEATHER, LEATHER SPLITS, WOVEN OR NON-WOVEN FABRICS, OR POLYMERIC FILMS.
Inventors
- 👤 A Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08L; C08L75/00; C08L75/04; C14; C14C; C14C11/00; C14C11/003; C14C11/006; D06N3/0056; D06N3/0061; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |