Patent US2588384A successfully refreshed from Google Patents.
Patent US2693996A successfully refreshed from Google Patents.
US2693996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water resistant leather and process of making the same
Assignee: Individual
•
Filing: 1949-11-28
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Granted: 1954-11-09
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Expires: 1969-11-28
Abstract
No abstract record available.
Inventors
- 👤 Fuchs George Hugo Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:43
CPC Classifications
C; C14; C14C; C14C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE METHOD OF MAKING LEATHER RESISTANT TO WATER PENETRATION WHICH COMPRISES INTRODUCING INTO THE LEATHER A MONOMERIC, ACIDIC SUCCINIC ACID DERIVATIVE HAVING LOW WATER SOLUBILITY SELECTED FROM THE GROUP CONSISTING OF SUCCINIC ACIDS AND THE ANHYDRIDES, HALF-ESTERS AND HALFSOAPS OF SAID SUCCINIC ACIDS, SAID DERIVATIVE CONTAINING AN ORGANIC HYDROPHOBIC WATERPROOFING GROUP SUBSTITUTED ON A NON-ACIDIC CARBON ATOM OF SUCCINIC ACID.
Claim 2
Independent Claim
60 words
THE METHOD OF MAKING LEATHER RESISTANT TO WATER PENETRATION WHICH COMPRISES INTRODUCING INTO THE LEATHER A MONOMERIC, ACIDIC SUCCINIC ACID DERIVATIVE HAVING LOW WATER SOLUBILITY SELECTED FROM THE GROUP CONSISTING OF SUCCINIC ACIDS AND THE ANHYDRIDES, HALF-ESTERS AND HALFSOAPS OF SAID SUCCINIC ACIDS, SAID DERIVATIVE CONTAINING AN ORGANIC HYDROPHOBIC WATERPROOFING GROUP SUBSTITUTED ON A NON-ACIDIC CARBON ATOM OF SUCCINIC ACID.
References Cited (Backward Citations)
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US2118308A
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US2123832A
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US2442672A
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US2425828A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |