US3048929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dehydrating hides
Assignee: Leather Res Corp
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Filing: 1959-12-15
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Granted: 1962-08-14
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Expires: 1979-12-15
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 15:36
CPC Classifications
F; F26; F26B; F26B15/00; F26B15/10; F26B15/12; F26B15/14; C; C14; C14B; C14B1/00; C14B1/02; C14B1/24; C14B1/26; F26B5/00; F26B5/005; C14B2700/00; C14B2700/07; C14B2700/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF DEHYDRATING WATER-WET HIDES AND SKINS WHICH COMPRISES EXTRACTING WATER THEREFROM WITH A WATER-MISCIBLE ORGANIC LIQUID SOLVENT SELECTED FROM THE CLASS CONSISTING OF ACETONE AND METHANOL, CONTINUING THE EXTRACTION AND PRODUCTING A SOLVENT-WATER MIXTURE ABOUT THE HIDES UNTIL THE SOLVENT TO WATER RATIO WITHIN THE HIDES IS AT LEAST 90 TO 10, REMOVING THE MIXING THUS PRODUCED FROM THE HIDES, PASSING A HEATED STREAM OF GAS ABOUT THE HIDES TO VAPORIZE SOLVENT AND WATER FROM THE HIDES, RECIRCULATING THE GAS STREAM ABOUT THE HIDES UNTIL THE SOLVENT, VAPOR CONCENRATION IN THE GAS IS AT LEAST 25 MOL PERCENT REMOVING A PORTION OF THE SOLVENT AND WATER VAPOR FROM THE RECIRCULATING GASA STREAM WHILE MAINTANING ITS SOLVENT VAPOR CONCENTRATION AT AT LEAST 25 MOL PERCENT, UNTIL AT LEAST 75% OF THE SOLVENT HAS BEEN REMOVED FROM THE HIDES, AND THEREAFTER VAPORIZING THE BALANCE OF THE SOLVENT FROM THE HIDES.
Claim 2
Independent Claim
150 words
THE METHOD OF DEHYDRATING WATER-WET HIDES AND SKINS WHICH COMPRISES EXTRACTING WATER THEREFROM WITH A WATER-MISCIBLE ORGANIC LIQUID SOLVENT SELECTED FROM THE CLASS CONSISTING OF ACETONE AND METHANOL, CONTINUING THE EXTRACTION AND PRODUCTING A SOLVENT-WATER MIXTURE ABOUT THE HIDES UNTIL THE SOLVENT TO WATER RATIO WITHIN THE HIDES IS AT LEAST 90 TO 10, REMOVING THE MIXING THUS PRODUCED FROM THE HIDES, PASSING A HEATED STREAM OF GAS ABOUT THE HIDES TO VAPORIZE SOLVENT AND WATER FROM THE HIDES, RECIRCULATING THE GAS STREAM ABOUT THE HIDES UNTIL THE SOLVENT, VAPOR CONCENRATION IN THE GAS IS AT LEAST 25 MOL PERCENT REMOVING A PORTION OF THE SOLVENT AND WATER VAPOR FROM THE RECIRCULATING GASA STREAM WHILE MAINTANING ITS SOLVENT VAPOR CONCENTRATION AT AT LEAST 25 MOL PERCENT, UNTIL AT LEAST 75% OF THE SOLVENT HAS BEEN REMOVED FROM THE HIDES, AND THEREAFTER VAPORIZING THE BALANCE OF THE SOLVENT FROM THE HIDES.
References Cited (Backward Citations)
GB148454A
Cited
US2500783A
Cited
US2906591A
Cited
US2824646A
Cited
US2889388A
Cited
US2917833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |