US3103447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leather and method for producing it
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
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Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:44
CPC Classifications
C; C14; C14C; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/4935
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
187 words
A PROCESS FOR TREATING LEATHER WHICH COMPRISES IMPREGNATING THE LEATHER ON THE GRAIN SIDE ONLY WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 7% BY WEIGHT OF A WATER-SOLUBLE AMMONIUM SALT OF A WATER-INSOLUBLE COPOLYMER OF 5 TO 35% BY WEIGHT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC, METHACRYLIC, AND ITACONIC ACIDS AND AT LEAST ONE ESTER SELECTED FROM THE GROUP CONSISTING OF A VINYL ESTER OF A SATURATED FATTY ACID HAVING FROM 1 TO 18 CARBON ATOMS AND AN ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID WITH A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL HAVING 1 TO 18 CARBON ATOMS, THE POLYMER HAVING A MOLECULAR WEIGHT SUCH THAT A SOLUTION OF 22% THEREOF IN WATER HAS A VISCOSITY FROM ABOUT 5 TO ABOUT 65 CPS. AT A PH OF ABOUT 7 AND A TEMPERATURE OF 25*C., THE AMOUNT OF SOLUTION APPLIED IN THIS FASHION BEING AT LEAST 15% BY WEIGHT OF THE LEATHER WHEREBY THE IMPREGNATION PENETRATES THROUGH THE CORIUM MINOR AND COPOLYMER IS DEPOSITED DOWN TO THE JUNCTION OF THE CORIUM MINOR WITH THE CORIUM MAJOR.
Claim 2
Dependent Claim
187 words
A PROCESS FOR TREATING LEATHER WHICH COMPRISES IMPREGNATING THE LEATHER ON THE GRAIN SIDE ONLY WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 7% BY WEIGHT OF A WATER-SOLUBLE AMMONIUM SALT OF A WATER-INSOLUBLE COPOLYMER OF 5 TO 35% BY WEIGHT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC, METHACRYLIC, AND ITACONIC ACIDS AND AT LEAST ONE ESTER SELECTED FROM THE GROUP CONSISTING OF A VINYL ESTER OF A SATURATED FATTY ACID HAVING FROM 1 TO 18 CARBON ATOMS AND AN ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID WITH A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL HAVING 1 TO 18 CARBON ATOMS, THE POLYMER HAVING A MOLECULAR WEIGHT SUCH THAT A SOLUTION OF 22% THEREOF IN WATER HAS A VISCOSITY FROM ABOUT 5 TO ABOUT 65 CPS. AT A PH OF ABOUT 7 AND A TEMPERATURE OF 25*C., THE AMOUNT OF SOLUTION APPLIED IN THIS FASHION BEING AT LEAST 15% BY WEIGHT OF THE LEATHER WHEREBY THE IMPREGNATION PENETRATES THROUGH THE CORIUM MINOR AND COPOLYMER IS DEPOSITED DOWN TO THE JUNCTION OF THE CORIUM MINOR WITH THE CORIUM MAJOR.
Claim 3
Dependent Claim
25 words
A PROCESS ACCORDING TO CLAIMM 1 IN WHICH THE IMPREG NATION IS FOLLOWED BY A STEP OF APPLYING A LEATHER COATING COMPOSITION CONTAINING A PIGMENT.
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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |