US2824816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating leather
Assignee: Rohm and Haas Co
•
Filing: 1954-05-13
•
Granted: 1958-02-25
•
Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 Ian C Somerville
- 👤 Richard F M Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
C; C14; C14C; C14C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF TREATING LEATHER COMPRISING AGITATING THE AIR-DRY LEATHER WITH A SOLUTION IN A VOLATILE HYDROPHOBIC ORGANIC SOLVENT MEDIUM OF A HYDROPHOBIC IMPREGNATE UNTIL SUBSTANTIAL IMPREGNATION IS EFFECTED, ADDING A WATERSOLUBLE HYDROPHILIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF VOLATILE ORGANIC SOLVENT AND AQUEOUS SOLUTIONS OF VOLATILE ORGANIC SOLVENT COMPRISING AT LEAST A PREDOMINANT PROPORTION OF ORGANIC SOLVENT IN WHICH THE IMPREGNANT HAS SUBSTANTIALLY LESS SOLUBILITY AS COMPARED TO THE HYDROPHOBIC SOLVENT WHILE CONTINUING THE AGITATION UNTIL ADDITIONAL IMPREGNATION IS EFFECTED, REMOVING THE LEATHER FROM THE LIQUID SYSTEM, DRAINING IT, AND DRYING IT.
Claim 2
Independent Claim
94 words
THE METHOD OF TREATING LEATHER COMPRISING AGITATING THE AIR-DRY LEATHER WITH A SOLUTION IN A VOLATILE HYDROPHOBIC ORGANIC SOLVENT MEDIUM OF A HYDROPHOBIC IMPREGNATE UNTIL SUBSTANTIAL IMPREGNATION IS EFFECTED, ADDING A WATERSOLUBLE HYDROPHILIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF VOLATILE ORGANIC SOLVENT AND AQUEOUS SOLUTIONS OF VOLATILE ORGANIC SOLVENT COMPRISING AT LEAST A PREDOMINANT PROPORTION OF ORGANIC SOLVENT IN WHICH THE IMPREGNANT HAS SUBSTANTIALLY LESS SOLUBILITY AS COMPARED TO THE HYDROPHOBIC SOLVENT WHILE CONTINUING THE AGITATION UNTIL ADDITIONAL IMPREGNATION IS EFFECTED, REMOVING THE LEATHER FROM THE LIQUID SYSTEM, DRAINING IT, AND DRYING IT.
References Cited (Backward Citations)
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Cited
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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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |