US2653967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tanning materials and process for preparing the same
Assignee: Standard Dyewood Co
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Filing: 1951-03-20
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Granted: 1953-09-29
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Expires: 1971-03-20
Abstract
No abstract record available.
Inventors
- 👤 Monroe Kenneth Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/10; C14C3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
PROCESS OF LIGHTENING THE COLOR OF NATURAL OCCURING TANNING MATERIALS FROM THE GROUP CONSISTING OF QUEBRACHO, WATTLE, CLUTCH, AND MANGROVE WHICH COMPRISES TREATING THE SAME WITH A SMALL, CATALYTIC AMOUNT OF ALKALI VANDATE, AND A REDUCING AGENT FROM THE GROUP CONSISTING OF SULFITES, HYDROSULFITES AND FORMATES.
Claim 2
Dependent Claim
43 words
A TANNING MATERIAL FROM THE GROUP CONSISTING OF QUEBRACHO, WATTLE, CLUTCH AND MANGROVE, THE COLOR OF WHICH HAS BEEN LIGHTENED BY TREATMENT WITH SMALL, CATALYTIC AMOUNTS OF AN ALKAL VANADATE, AND A REDUCING AGENT FROM THE GROUP CONSISTING OF SULFITES, HYDROSULFITES AND FORMATES.
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) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |