Patent US2628716A successfully refreshed from Google Patents.
US2628716A
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Flotation process
Assignee: Beazer East Inc
•
Filing: 1946-03-15
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Granted: 1953-02-17
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Expires: 1966-03-15
Abstract
No abstract record available.
Inventors
- 👤 William H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:26
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
IN A PROCESS FOR FROTH FLOTATION THE STEPS OF PREPARING A MINERAL PULP OF SULFIDIC ORE, INCORPORATING THEREIN A THIOPYRIMIDINE HAVING THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
24 words
IN A PROCESS FOR FROTH FLOTATION THE STEPS OF PREPARING A MINERAL PULP OF SULFIDIC ORE, INCORPORATING THEREIN A THIOPYRIMIDINE HAVING THE FOLLOWING STRUCTURE:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |