Patent US2942930A successfully refreshed from Google Patents.
US2942930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alum tannage
Assignee: Individual
•
Filing: 1958-11-07
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Granted: 1960-06-28
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Expires: 1978-11-07
Abstract
No abstract record available.
Inventors
- 👤 Fred P Luvisi
- 👤 William F Happich
- 👤 Mary V Hannigan
- 👤 Clarence W Beebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:45
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR TANNING SKINS COMPRISING IMPREGNATING THE SKINS WITH A SOLUTION OF A WATER SOLUBLE ALUMINUM SALT UNTIL THE SKINS ARE TANNED, AND SUBJECTING THE TANNED SKINS TO THE ACTION OF A WATER SOLUBLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMER OF ACRYLIC ACID, SODIUM POLYACRYLATE AND AMMONIUM POLYACRYLATE, TO FIX THE ALUMINUM SALT IN THE TANNED SKINS, AND SUBJECTING THE THUS TANNED SKINS TO AN AQUEOUS FAT-LIQUORING TREATMENT.
Claim 2
Dependent Claim
71 words
A PROCESS FOR TANNING SKINS COMPRISING IMPREGNATING THE SKINS WITH A SOLUTION OF A WATER SOLUBLE ALUMINUM SALT UNTIL THE SKINS ARE TANNED, AND SUBJECTING THE TANNED SKINS TO THE ACTION OF A WATER SOLUBLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMER OF ACRYLIC ACID, SODIUM POLYACRYLATE AND AMMONIUM POLYACRYLATE, TO FIX THE ALUMINUM SALT IN THE TANNED SKINS, AND SUBJECTING THE THUS TANNED SKINS TO AN AQUEOUS FAT-LIQUORING TREATMENT.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |