US2917833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of untanned skins with water-miscible organic solvent containing a relatively non-hygroscopic organic compound
Assignee: Leather Res Corp
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Filing: 1955-09-21
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Granted: 1959-12-22
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Expires: 1975-09-21
Abstract
No abstract record available.
Inventors
- 👤 Seymour S Kremen
- 👤 Southwood Robert Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
C; C14; C14C; C14C1/00; C14C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN THE METHOD OF DEHYDRATING WATER-WET UNTANNED HIDES WHICH COMPRISES EXTRACTING WATER FROM THE HIDES WITH A LOW-BOILING WATER-MISCIBLE, INERT ORGANIC SOLVENT, THE IMPROVEMEMT WHICH COMPRISES ENDING THE EXTRACTION AT A POINT WHERE THE HIDES CONTAIN FROM 2 TO 15% RESIDUAL WATER, AT LEAST THE FINAL EXTRACTION OF WATER BEING DONE WITH A LOW-BOILING, WATER-MISCIBLE, INERT ORGANIC SOLVENT CONTAINING 0.4 TO 4% OF A RELATIVELY NON-HYGROSCOPIC ADDANT HAVING A BOILING POINT OF AT LEAST 150* C., AND WHICH IS A COMPOUND SOLUBLE IN THE SOLVENT AND SELECTED FROM THE GROUP CONSISTING OF: (A) ALIPHATIC ALCOHOLS, ALIPHATIC SIMPLE ETHERS, AND ALIPHATIC ETHER ALCOHOLS CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN, AND IN WHICH THE OXYGEN IS PRESENTA AS A RADICAL OF THE GROUP CONSISTING OF PRIMARY HYDROXYL AND ETHER, THE RATIO OF SAID RADICALS TO CARBON BEING SUCH AS TO YIELD N=50 TO 90 IN THE FORMULA
Claim 2
Dependent Claim
145 words
IN THE METHOD OF DEHYDRATING WATER-WET UNTANNED HIDES WHICH COMPRISES EXTRACTING WATER FROM THE HIDES WITH A LOW-BOILING WATER-MISCIBLE, INERT ORGANIC SOLVENT, THE IMPROVEMEMT WHICH COMPRISES ENDING THE EXTRACTION AT A POINT WHERE THE HIDES CONTAIN FROM 2 TO 15% RESIDUAL WATER, AT LEAST THE FINAL EXTRACTION OF WATER BEING DONE WITH A LOW-BOILING, WATER-MISCIBLE, INERT ORGANIC SOLVENT CONTAINING 0.4 TO 4% OF A RELATIVELY NON-HYGROSCOPIC ADDANT HAVING A BOILING POINT OF AT LEAST 150* C., AND WHICH IS A COMPOUND SOLUBLE IN THE SOLVENT AND SELECTED FROM THE GROUP CONSISTING OF: (A) ALIPHATIC ALCOHOLS, ALIPHATIC SIMPLE ETHERS, AND ALIPHATIC ETHER ALCOHOLS CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN, AND IN WHICH THE OXYGEN IS PRESENTA AS A RADICAL OF THE GROUP CONSISTING OF PRIMARY HYDROXYL AND ETHER, THE RATIO OF SAID RADICALS TO CARBON BEING SUCH AS TO YIELD N=50 TO 90 IN THE FORMULA
References Cited (Backward Citations)
US1066231A
Cited
US1715621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |