Patent US4587443A successfully refreshed from Google Patents.
Patent US2977196A successfully refreshed from Google Patents.
US2977196A
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Defluorination method
Assignee: International Minerals and Chemical Corp
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Filing: 1955-07-01
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Granted: 1961-03-28
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Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond C Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:23
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/328; C01B25/18; C01B25/234; C01B25/2343; Y; Y10; Y10S; Y10S71/00; Y10S71/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR ELIMINATING FLUORINE FROM FLUORINECONTAINING PHOSPHATIC MATERIALS IN AQUEOUS SOLUTION WHICH COMPRISES CONCURRENTLY INTRODUCING SAID SOLUTION AND STEAM IN AN AMOUNT REQUISITE TO PROVIDE AT LEAST ABOUT THREE POUNDS OF STEAM FOR EACH TWENTY POUNDS OF PHOSPHORUS PENTOXIDE PRESENT IN SAID SOLUTION INTO A FLAME IN A COMBUSTION ZONE UNDER CONDITIONS TO OBTAIN A TEMPERATURE OF AT LEAST 300*F. IN SAID COMBUSTION ZONE, INTIMATELY MIXING AND ENTRAINING SAID SOLUTION IN SUBDIVIDED CONDITION IN THE COMBUSTION GASES PRODUCED BY SAID FLAME, REMOVING SAID COMBUSTION GASES, STEAM AND ENTRAINED SOLUTION FROM SAID COMBUSTION ZONE, SEPARATING SAID SOLUTION FROM SAID COMBUSTION GASES AND RECOVERING SAID SEPARATED SOLUTION AS A PRODUCT CONTAINING PHOSPHATIC MATERIALS OF SUBSTANTIALLY REDUCED FLUORINE CONTENT.
Claim 2
Dependent Claim
117 words
A PROCESS FOR ELIMINATING FLUORINE FROM FLUORINECONTAINING PHOSPHATIC MATERIALS IN AQUEOUS SOLUTION WHICH COMPRISES CONCURRENTLY INTRODUCING SAID SOLUTION AND STEAM IN AN AMOUNT REQUISITE TO PROVIDE AT LEAST ABOUT THREE POUNDS OF STEAM FOR EACH TWENTY POUNDS OF PHOSPHORUS PENTOXIDE PRESENT IN SAID SOLUTION INTO A FLAME IN A COMBUSTION ZONE UNDER CONDITIONS TO OBTAIN A TEMPERATURE OF AT LEAST 300*F. IN SAID COMBUSTION ZONE, INTIMATELY MIXING AND ENTRAINING SAID SOLUTION IN SUBDIVIDED CONDITION IN THE COMBUSTION GASES PRODUCED BY SAID FLAME, REMOVING SAID COMBUSTION GASES, STEAM AND ENTRAINED SOLUTION FROM SAID COMBUSTION ZONE, SEPARATING SAID SOLUTION FROM SAID COMBUSTION GASES AND RECOVERING SAID SEPARATED SOLUTION AS A PRODUCT CONTAINING PHOSPHATIC MATERIALS OF SUBSTANTIALLY REDUCED FLUORINE CONTENT.
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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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |