US3259457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc hydrosulfite solutions with increased stability and processes for the production thereof
Assignee: Tennessee Corp
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Filing: 1962-06-12
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Granted: 1966-07-05
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Sauls
- 👤 Ernest A Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/64; C01B17/66; C01B17/665
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
IN PROCESS FOR STABILIZING ZNS2O4 SOLUTIONS AGAINST DECOMPOSITION, THE STEP OF ADDING TO A FRESHLY PREPARED SOLUTION OF APPROXIMATELY 38% ZNS2O4 ABOUT 1-2% ZNO, ABOUT .06-0.3% ZINC DUST, AND ABOUT 1.0% HYDROQUINONE.
References Cited (Backward Citations)
US1975443A
Cited
US2121397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |