US2496640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fat liquoring and alum tanning
Assignee: Nopco Chemical Co
•
Filing: 1944-05-18
•
Granted: 1950-02-07
•
Expires: 1964-05-18
Abstract
No abstract record available.
Inventors
- 👤 Schiller Bernhardt
- 👤 Ralph M Beach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
C; C14; C14C; C14C9/00; C14C9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A NOVEL PROCESS OF TANNING WHICH COMPRISES SUBJECTING THE SKIN TO THE ACTION OF AN AQUEOUS ALUM SALT TANNING SOLUTION, THEN SUBJECTING THE SKIN TO THE ACTION OF AN ACID-STABLE FAT LIQUORING COMPOSITION IN CHEMICAL EMULSION IN SAID TANNING AGENT SOLUTION, SAID FAT LIQUORING COMPOSITION COMPRISING A LEATHER TREATING OIL AND A CATIONIC SURFACE ACTIVE BASE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DERIVATIVES ALKYLATED WITH A DIALKYL SULFATE, CONTAINING A TOTAL OF FROM 2 TO 4 CARBON ATOMS, OF AMINO-AMIDES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
85 words
A NOVEL PROCESS OF TANNING WHICH COMPRISES SUBJECTING THE SKIN TO THE ACTION OF AN AQUEOUS ALUM SALT TANNING SOLUTION, THEN SUBJECTING THE SKIN TO THE ACTION OF AN ACID-STABLE FAT LIQUORING COMPOSITION IN CHEMICAL EMULSION IN SAID TANNING AGENT SOLUTION, SAID FAT LIQUORING COMPOSITION COMPRISING A LEATHER TREATING OIL AND A CATIONIC SURFACE ACTIVE BASE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DERIVATIVES ALKYLATED WITH A DIALKYL SULFATE, CONTAINING A TOTAL OF FROM 2 TO 4 CARBON ATOMS, OF AMINO-AMIDES HAVING THE GENERAL FORMULA:
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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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |