US2906591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dehydrating with organic solvent and then vegetable tanning untanned skins
Assignee: ALEXIS E USHAKOFF
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Filing: 1954-06-21
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Granted: 1959-09-29
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Alexis E Ushakoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:08
CPC Classifications
C; C14; C14C; C14C1/00; C14C1/08; C14C3/00; C14C3/02; C14C3/08; C14C3/10; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD OF TANNING SKINS UNDER SUBSTANTIALLY, NON AQUEOUS CONDITIONS CONSISTING ESSENTIALLY OF CONTACTING AN UNTANNED WATER-WET SKIN WITH AN INERT WATER-MISCIBLE ORGANIC SOLVENT UNTIL SUBSTANTIALLYALL THE WATER FROM THE SKIN IS EXTRACTED AND REPLACED BY SAID SOLVENT, THEN PROCESSING THE SKIN IN THE ABSCENCE OF WATER WITH THE STEPS OF IMPREGNATING THE SKIN WITH AN INERT ORGANIC SOLVENT SOLUTION OF A VEGETABLE TANNING AT AN ACIDITY OF THE SKIN SUCH THAT THE TANNING IS INTRODUCED INTO THE SKIN, CONTROLING THE ASCIDITY OF THE SKIN UNTIL THE TANIN IMPREGNATED SKIN IS BROUGHT TO AN ACIDITY CORRESPONDING TO A PH OF MORE THAN 6, THE TANNIN IS DISTRIBUTED THROUGH THE SKIN AND THE SKIN REMAINS ESSENTIALLY UNTANNED, THEN FINALLY ADDING AN ACIDIC REAGENT TO THE SKIN TO BRING THE FINAL ACIDITY OF THE SKIN TO CORRESPOND TO A PH OF BETWEEN 2.0 AND 6.0 AND DRYING THE SKIN TO REMOVE ORGANIC SOLVENT SO THAT THE SKIN IS TANNED.
Claim 2
Independent Claim
157 words
A METHOD OF TANNING SKINS UNDER SUBSTANTIALLY, NON AQUEOUS CONDITIONS CONSISTING ESSENTIALLY OF CONTACTING AN UNTANNED WATER-WET SKIN WITH AN INERT WATER-MISCIBLE ORGANIC SOLVENT UNTIL SUBSTANTIALLYALL THE WATER FROM THE SKIN IS EXTRACTED AND REPLACED BY SAID SOLVENT, THEN PROCESSING THE SKIN IN THE ABSCENCE OF WATER WITH THE STEPS OF IMPREGNATING THE SKIN WITH AN INERT ORGANIC SOLVENT SOLUTION OF A VEGETABLE TANNING AT AN ACIDITY OF THE SKIN SUCH THAT THE TANNING IS INTRODUCED INTO THE SKIN, CONTROLING THE ASCIDITY OF THE SKIN UNTIL THE TANIN IMPREGNATED SKIN IS BROUGHT TO AN ACIDITY CORRESPONDING TO A PH OF MORE THAN 6, THE TANNIN IS DISTRIBUTED THROUGH THE SKIN AND THE SKIN REMAINS ESSENTIALLY UNTANNED, THEN FINALLY ADDING AN ACIDIC REAGENT TO THE SKIN TO BRING THE FINAL ACIDITY OF THE SKIN TO CORRESPOND TO A PH OF BETWEEN 2.0 AND 6.0 AND DRYING THE SKIN TO REMOVE ORGANIC SOLVENT SO THAT THE SKIN IS TANNED.
References Cited (Backward Citations)
US2781241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |