US2523325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tanning in a nonaqueous medium
Assignee: United Shoe Machinery Corp
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Filing: 1947-07-10
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Granted: 1950-09-26
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Expires: 1967-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert C Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:42
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
A METHOD OF TANNING HIDE WHICH COMPRISES DRYING THE HIDE BY THE SOLVENT ACTION OF AN ORGANIC LIQUID TO BRING THE MOISTURE CONTENT TO FROM 10% TO 15% AND CONTACTING THE DRIED HIDE WITH AN ORGANIC SOLVENT SOLUTION CONTAINING FROM 10% TO 50% BY VOLUME BASED ON THE VOLUME OF THE SOLUTION OF A MEMBER OF THE GROUP CONSISTING OF ACID CHLORIDES OF FATTY ACIDS HAVING FROM 3 TO 18 CARBON ATOMS, DI-ACID CHLORIDES OF DI-BASIC ACIDS HAVING FROM 4 TO 10 CARBON ATOMS, PHENOXY ACETYL CHLORIDE, M-SULFOBENZOYL DICHLORIDE, TRICHLORACETYL CHLORIDE, AND CHLORACETYL CHLORIDE, THE SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF THE FORMAL OF THE MONOMETHYL ETHER OF DIETHYLENE GLYCOL AND THE FORMAL OF THE MONOMETHYL ETHER OF ESTYLENE GLYCOL.
References Cited (Backward Citations)
BE447715A
Cited
US2015912A
Cited
US2127841A
Cited
US2086676A
Cited
US2131145A
Cited
GB461179A
Cited
GB509703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |