US3436303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-laid leather substitute containing leather fibers,staple fibers and polyurethane aqueous slurry and method for making same
Assignee: 3M Co
•
Filing: 1965-09-16
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Granted: 1969-04-01
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Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Albert E Raymond
- 👤 William J Fraser
- 👤 Frank Swedish Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:45
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D06; D06N; D06N3/00; D06N3/0002; D06N3/0056; D06N3/0061; D06N3/12; D06N3/14; D21H27/00; D21H27/30; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249941; Y10T428/25; Y10T428/29; Y10T428/2904; Y10T428/31504; Y10T428/31551; Y10T428/31558
Claims Analysis
Total Claims: 0
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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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |