US2868623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of neutral stannous salts
Assignee: Second Bank-State Street Trust Co
•
Filing: 1954-07-07
•
Granted: 1959-01-13
•
Expires: 1974-07-07
Abstract
No abstract record available.
Inventors
- 👤 Walter A Vittands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:07
CPC Classifications
C; C01; C01G; C01G19/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
IN THE MANUFACTURE OF A RELATIVELY CONCENTRATED, SUBSTANTIALLY NEUTRAL AQUEOUS STANNOUS CHLORIDE SOLUTION FROM A CONCENTRATED STANNOUS CHLORIDE SOLUTION HAVING A HIGH FREE HYDROCHLORIC ACID CONTENT, THE STEPS COMPRISING WITH DRAWING FROM THE ACIDIFIED SOLUTION A PREDETERMINED ALIQUOT, ADDING TO SAID ALIQUOT A WATER-SOLUBLE ALKALI IN AN AMOUNT SUFFICIENT TO PRECIPITATE THE TIN COMPONENT AS A HYDRATED STANNOUS OXIDE, AND ADDING THE FRESHLY PRECIPITATED HYDROUS STANNOUS OXIDE TO THE REMAINDER OF SAID SOLUTION TO REACT WITH THE FREE ACID AND FORM A SUBSTANTIALLY NEUTRAL AQUEOUS STANNOUS CHLORIDE.
References Cited (Backward Citations)
US810454A
Cited
US877248A
Cited
US1030110A
Cited
US1986334A
Cited
US2419528A
Cited
US2667433A
Cited
US2664341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |