US2887410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the dressing of leather
Assignee: Bayer AG
•
Filing: 1955-01-21
•
Granted: 1959-05-19
•
Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Graulich Wilhelm
- 👤 Eitel Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:28
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS OF DRESSING LEATHER WHEREIN THE LEATHER IS FIRST COATED WITH A COMPOSITION CONTAINING A SINGLE COPOLYMER, SAID COPOLYMER DERIVED ESSENTIALLY FROM BUTADIENE AND ACRYLONITRILE, SAID COPOLYMER HAVING AN OILYVISCOUS CONSISTENCY AND A DEFO HARDNESS NO GREATER THAN 0.
Claim 2
Dependent Claim
40 words
A PROCESS OF DRESSING LEATHER WHEREIN THE LEATHER IS FIRST COATED WITH A COMPOSITION CONTAINING A SINGLE COPOLYMER, SAID COPOLYMER DERIVED ESSENTIALLY FROM BUTADIENE AND ACRYLONITRILE, SAID COPOLYMER HAVING AN OILYVISCOUS CONSISTENCY AND A DEFO HARDNESS NO GREATER THAN 0.
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |