Patent US3340167A successfully refreshed from Google Patents.
US3340167A
Expired / Lapsed
US
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Comminuted bismuth subnitrate and process for making same
Assignee: Nv V/h G Koopman Cv
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Filing: 1963-09-16
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Granted: 1967-09-05
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Koopman Gerardus Franciscus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:22
CPC Classifications
C; C01; C01G; C01G29/00; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR PRODUCING HIGHLY COMMINUTED BISMUTH SUBNITRATE, COMPRISING THE STEPS OF PREPARING A SOLUTION OF BISMUTH NITRATE IN NITRIC ACID, ADMIXING AN ALKALI WITH SAID SOLUTION WHILE VIBRATING THE SOLUTION AT HIGH FREQUENCY UNTIL THE PH OF SAID SOLUTION HAS REACHED A VALUE OF SUBSTANTIALLY 2.9, CONTINUING THE VIBRATION UNTIL SUBSTANTIALLY ALL BISMUTH NITRATE IN THE SOLUTION HAS BEEN CONVERTED TO BISMUTH SUBNITRATE FORMING A PRECIPITATE THEREIN, AND RECOVERING SAID PRECIPITATE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PRODUCING HIGHLY COMMINUTED BISMUTH SUBNITRATE, COMPRISING THE STEPS OF PREPARING A SOLUTION OF BISMUTH NITRATE IN NITRIC ACID, ADMIXING AN ALKALI WITH SAID SOLUTION WHILE VIBRATING THE SOLUTION AT HIGH FREQUENCY UNTIL THE PH OF SAID SOLUTION HAS REACHED A VALUE OF SUBSTANTIALLY 2.9, CONTINUING THE VIBRATION UNTIL SUBSTANTIALLY ALL BISMUTH NITRATE IN THE SOLUTION HAS BEEN CONVERTED TO BISMUTH SUBNITRATE FORMING A PRECIPITATE THEREIN, AND RECOVERING SAID PRECIPITATE.
References Cited (Backward Citations)
US3222231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |