Patent US2599142A successfully refreshed from Google Patents.
US2599142A
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Tanning and bleaching leather with a sulfoaromaticmelamine-formaldehyde resin
Assignee: Wyeth Holdings LLC
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Filing: 1949-08-12
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Granted: 1952-06-03
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Expires: 1969-08-12
Abstract
No abstract record available.
Inventors
- 👤 Jack T Thurston
- 👤 Adams Pierrepont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:19
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/18; C14C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS OF TANNING AND BLEACHING WHICH COMPRISES TREATING HIDES AND SKINS WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ACID-SENSITIVE CONDENSATION PRODUCT OF 1 MOL OF A SULFONATED AROMATIC HYDROCARBON SUBSTITUTED MELAMINE HAVING THE FORMULA
Claim 2
Dependent Claim
35 words
A PROCESS OF TANNING AND BLEACHING WHICH COMPRISES TREATING HIDES AND SKINS WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ACID-SENSITIVE CONDENSATION PRODUCT OF 1 MOL OF A SULFONATED AROMATIC HYDROCARBON SUBSTITUTED MELAMINE HAVING THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |