US2516276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing arsenic compounds
Assignee: Parke Davis and Co LLC
•
Filing: 1944-01-31
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Granted: 1950-07-25
•
Expires: 1964-01-31
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Tullar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:26
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/66; C07F9/70; C07F9/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
METHOD FOR OBTAINING A STABLE, DRY ADDITION SALT OF AN ACID OF FORMULA HA WITH 3-AMINO-4HYDROXYPHENYLARSEN - (ANHYDRO) - OXIDE WHICH COMPRISES FREEZING AN AQUEOUS SOLUTION OF SAID SALT AND COMPLETELY SUBLIMING AWAY THE ICE THEREFROM UNDER VACUUM, A OF SAID FORMULA REPRESENTING THE ANION OF A NON-TOXIC ACID STRONG ENOUGH THAT AQUEOUS SOLUTIONS OF SAID ADDITION SALT HAVE A PH NOT GREATER THAN ABOUT PH 3.
Claim 2
Dependent Claim
67 words
METHOD FOR OBTAINING A STABLE, DRY ADDITION SALT OF AN ACID OF FORMULA HA WITH 3-AMINO-4HYDROXYPHENYLARSEN - (ANHYDRO) - OXIDE WHICH COMPRISES FREEZING AN AQUEOUS SOLUTION OF SAID SALT AND COMPLETELY SUBLIMING AWAY THE ICE THEREFROM UNDER VACUUM, A OF SAID FORMULA REPRESENTING THE ANION OF A NON-TOXIC ACID STRONG ENOUGH THAT AQUEOUS SOLUTIONS OF SAID ADDITION SALT HAVE A PH NOT GREATER THAN ABOUT PH 3.
References Cited (Backward Citations)
GB260382A
Cited
US1970956A
Cited
US2092036A
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US2066302A
Cited
US2149304A
Cited
US2099659A
Cited
US2221817A
Cited
US2222383A
Cited
US2349729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |