Patent EP0492545A2 successfully refreshed from Google Patents.
US3537883A
Expired / Lapsed
US
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Finished leather substitute
Assignee: Rohm and Haas Co
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Filing: 1968-07-11
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Granted: 1970-11-03
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Expires: 1988-07-11
Abstract
No abstract record available.
Inventors
- 👤 Robert S Shaw
- 👤 Bayard V Tirrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/04; D06N3/18; D06N3/183; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24355; Y10T428/24438; Y10T428/24471; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31855
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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |