US2970031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for tanning leather
Assignee: Wyeth Holdings LLC
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Filing: 1955-08-31
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Granted: 1961-01-31
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Expires: 1975-08-31
Abstract
No abstract record available.
Inventors
- 👤 Daniel E Nagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:19
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR TANNING LEATHER WHICH COMPRISES FIRST SOAKING PICKLED HIDES IN A WATER SOLUTION OF A MINERAL TANNING AGENT AND THEN IMPREGNATING THE RESULTING HIDES CONTAINING SAID MINERAL TANNING AGENT WITH AN AQUEOUS ALKALI METAL CYANATE SOLUTION U NTIL A QUANTITY OF ALKALI METAL CYANATE HAS BEEN ABSORBED SUFFICIENT TO SET THE MINERAL TANNING AGENT THEREIN AND CONVERT THE HIDES INTO LEATHER.
Claim 2
Dependent Claim
63 words
A PROCESS FOR TANNING LEATHER WHICH COMPRISES FIRST SOAKING PICKLED HIDES IN A WATER SOLUTION OF A MINERAL TANNING AGENT AND THEN IMPREGNATING THE RESULTING HIDES CONTAINING SAID MINERAL TANNING AGENT WITH AN AQUEOUS ALKALI METAL CYANATE SOLUTION U NTIL A QUANTITY OF ALKALI METAL CYANATE HAS BEEN ABSORBED SUFFICIENT TO SET THE MINERAL TANNING AGENT THEREIN AND CONVERT THE HIDES INTO LEATHER.
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |