US3663472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for surfacing leathers and leather substitutes based on filled polyurethane latex
Assignee: 3M Co
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Filing: 1971-03-15
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Granted: 1972-05-16
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Expires: 1991-03-15
Abstract
Abstract FORMATION OF LEATHER-LIKE SURFACING 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 SPHERIODS, 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 IMPREFECT LEATHER, LEATHER SPLITS, WOVEN OR NON-WOVEN FABRICS, OR POLYMERIC FILMS.
Inventors
- 👤 Albert E Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:01
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; C14C11/006; C08; C08L; C08L75/00; C08L75/04
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |