US3038818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing leather with improved water resistance and article resulting therefrom
Assignee: Dow Silicones Corp
•
Filing: 1959-03-11
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Granted: 1962-06-12
•
Expires: 1979-03-11
Abstract
No abstract record available.
Inventors
- 👤 Donald E Findlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:37
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF RENDERING LEATHER WATER-RESISTANT COMPRISING TREATING LEATHER WITH (1) A DISPERSION OF A WATER SOLUBLE ZIRCONIUM SALT IN AMOUNT SUCH THAT THE ZICONIUM PICKUP IN THE LEATHER, (2) DRYING THE LEATHER AND THE DRY WEIGHT OF THE LEATHER, (2) DRYING THE LEATHER AND (3) THEREAFTER APPLYING TO THE LEATHER AT LEAST 2% BY WEIGHT BASED ON THE WEIGHT OF THE LEATHER, OF A MATERIAL CONSISTING ESSENTIALLY OF (A) FROM 5 TO 70% BY WEIGHT OF A METHYLPOLYSILOXANE RESIN COMPOSED OF TRIMETHYLSILOXANE UNITS AND SIO2 UNITS IN SUCH PROPORTION THAT THE RATIO OF METHYL TO SILICON ATOMS IS FROM .6:1 TO 1:8:1 (B) FROM 15 TO 80% BY WEIGHT OF POLYSILOXANES HAVING THE GENERAL FORMULA
Claim 2
Independent Claim
116 words
A METHOD OF RENDERING LEATHER WATER-RESISTANT COMPRISING TREATING LEATHER WITH (1) A DISPERSION OF A WATER SOLUBLE ZIRCONIUM SALT IN AMOUNT SUCH THAT THE ZICONIUM PICKUP IN THE LEATHER, (2) DRYING THE LEATHER AND THE DRY WEIGHT OF THE LEATHER, (2) DRYING THE LEATHER AND (3) THEREAFTER APPLYING TO THE LEATHER AT LEAST 2% BY WEIGHT BASED ON THE WEIGHT OF THE LEATHER, OF A MATERIAL CONSISTING ESSENTIALLY OF (A) FROM 5 TO 70% BY WEIGHT OF A METHYLPOLYSILOXANE RESIN COMPOSED OF TRIMETHYLSILOXANE UNITS AND SIO2 UNITS IN SUCH PROPORTION THAT THE RATIO OF METHYL TO SILICON ATOMS IS FROM .6:1 TO 1:8:1 (B) FROM 15 TO 80% BY WEIGHT OF POLYSILOXANES HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2774690A
Cited
US2728736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |