US2701749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of tanning with borated methylol phenols
Assignee: Wyeth Holdings LLC
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Filing: 1949-11-14
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Granted: 1955-02-08
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Daniel E Nagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:29
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS WHICH COMPRISES TREATING SUBSTANTIALLY SALT-FREE SKINS OR HIDES WITH AN AQUEOUS SOLUTION AT A PH OF AT LEAST ABOUT 6.5 OF A WATER-SOLUBLE POLYMERIZABLE CONDENSATION PRODUCT OBTAINED BY CONDENSING UNDER ALKALINE CONDITIONS A FORMALDEHYDE-REACTIVE PHENOL WITH FORMALDEHYDE IN RELATIVE MOLAR PROPORTIONS OF FROM ABOUT 1:1 TO ABOUT 1:2 AND AT LEAST ABOUT 25 PER CENT OF BORAX, BASED ON THE WEIGHT OF PHENOL, AND SUBSEQUENTLY INSOLUBILIZING THE CONDENSATION PRODUCT IN THE SKINS OR HIDES.
Claim 2
Dependent Claim
76 words
A PROCESS WHICH COMPRISES TREATING SUBSTANTIALLY SALT-FREE SKINS OR HIDES WITH AN AQUEOUS SOLUTION AT A PH OF AT LEAST ABOUT 6.5 OF A WATER-SOLUBLE POLYMERIZABLE CONDENSATION PRODUCT OBTAINED BY CONDENSING UNDER ALKALINE CONDITIONS A FORMALDEHYDE-REACTIVE PHENOL WITH FORMALDEHYDE IN RELATIVE MOLAR PROPORTIONS OF FROM ABOUT 1:1 TO ABOUT 1:2 AND AT LEAST ABOUT 25 PER CENT OF BORAX, BASED ON THE WEIGHT OF PHENOL, AND SUBSEQUENTLY INSOLUBILIZING THE CONDENSATION PRODUCT IN THE SKINS OR HIDES.
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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) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |