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US2768056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of leather
Assignee: General Dyestuff Corp
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Filing: 1951-12-28
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Granted: 1956-10-23
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Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:10
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A PROCESS COMPRISING IMPREGNATING HIDES AND SKINS WITH A METHYL VINYL ETHER-MALEIC ANHYDRIDE COPOLYMER IN AN AQUEOUS MEDIUM MAINTAINED THROUGHOUT THE IMPREGNATION OF A PH OF ABOUT 2.5 TO 4.0.
Claim 2
Dependent Claim
30 words
A PROCESS COMPRISING IMPREGNATING HIDES AND SKINS WITH A METHYL VINYL ETHER-MALEIC ANHYDRIDE COPOLYMER IN AN AQUEOUS MEDIUM MAINTAINED THROUGHOUT THE IMPREGNATION OF A PH OF ABOUT 2.5 TO 4.0.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |