Patent US3430765A successfully refreshed from Google Patents.
US3430765A
Expired / Lapsed
US
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Beneficiation of fluorspar ores
Assignee: Honeywell International Inc
•
Filing: 1965-08-11
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Granted: 1969-03-04
•
Expires: 1985-08-11
Abstract
No abstract record available.
Inventors
- 👤 George E Allen
- 👤 Glenn E Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2168762A
Cited
FR551952A
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US1671698A
Cited
US1951326A
Cited
US1972588A
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DE745363C
Cited
US2385819A
Cited
US3078997A
Cited
US3295767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |