US3231420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating leather and leathers obtained
Assignee: Rohm and Haas Co
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Filing: 1962-07-06
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Granted: 1966-01-25
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 John A Lowell
- 👤 Edwin H Kroeker
- 👤 Peter R Buechler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:01
CPC Classifications
C; C14; C14C; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/4935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCES FOR TREATING LEATHER WHICH COMPRISES IMPREGNATING THE LEATHER ON THE GRAIN SIDE ONLY WITH AN ORGANIC SOLVENT SOLUTION CONTAINING ABOUT 10% TO 35% BY WEIGHT OF A WATER-INSOLUBLE COPOLYMER OF MONOETHYLENICALLY UNSATURATED MOLECULES COMPRISING (A) ABOUT 3.5 TO 18.5 MOL PERCENT OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND ITACONIC ACID, (B) ABOUT 1.5 TO 8 MOL PERCENT OF AT LEAST ONE ESTER OF AN ACID OF THE FORMULA
Claim 2
Dependent Claim
79 words
A PROCES FOR TREATING LEATHER WHICH COMPRISES IMPREGNATING THE LEATHER ON THE GRAIN SIDE ONLY WITH AN ORGANIC SOLVENT SOLUTION CONTAINING ABOUT 10% TO 35% BY WEIGHT OF A WATER-INSOLUBLE COPOLYMER OF MONOETHYLENICALLY UNSATURATED MOLECULES COMPRISING (A) ABOUT 3.5 TO 18.5 MOL PERCENT OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND ITACONIC ACID, (B) ABOUT 1.5 TO 8 MOL PERCENT OF AT LEAST ONE ESTER OF AN ACID OF THE FORMULA
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |