US3282644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of hydrogen fluoride
Assignee: EIDP Inc
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Filing: 1965-02-15
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Granted: 1966-11-01
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Expires: 1985-02-15
Abstract
No abstract record available.
Inventors
- 👤 Charles C Quarles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:35
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191; C01B7/192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A PROCESS FOR PRODUCING HYDROGEN FLUORIDE FROM CALCIUM FLUORIDE WHEREIN SOLID PARTICLES OF SAID FLUORIDE HAVING A PARTIAL SIZE "NOT LESS THAN 75% THROUGH 100 MESH" ARE CONTACTED WITH A GAS-CONTAINING SULFUR TRIOXIDE VAPOR, WATER VAPOR, AND SULFURIC ACID VAPOR IN A CLOSED REACTOR AT CONDITIONS WHEREBY SULFURIC ACID CONDENSES ON SAID SOLID PARTICLES AND THE HEAT LIBERATED THEREBY SUPPLIES THE ENDOTHERMIC HEAT REQUIRED TO REACT THE CONDENSED ACID WITH TEH FLUORIDE OF SAID SOLID PARTICLES, THE IMPROVEMENT COMPRISING SUPPLYING AN AMOUNT OF ENERGY INPUT TO SAID SOLID PARTICLES THROUGHOUT ITS REACTION WITH SULFURIC ACID IN EXCESS OF 4000FT. LB. OF FEED.
Claim 2
Dependent Claim
103 words
IN A PROCESS FOR PRODUCING HYDROGEN FLUORIDE FROM CALCIUM FLUORIDE WHEREIN SOLID PARTICLES OF SAID FLUORIDE HAVING A PARTIAL SIZE "NOT LESS THAN 75% THROUGH 100 MESH" ARE CONTACTED WITH A GAS-CONTAINING SULFUR TRIOXIDE VAPOR, WATER VAPOR, AND SULFURIC ACID VAPOR IN A CLOSED REACTOR AT CONDITIONS WHEREBY SULFURIC ACID CONDENSES ON SAID SOLID PARTICLES AND THE HEAT LIBERATED THEREBY SUPPLIES THE ENDOTHERMIC HEAT REQUIRED TO REACT THE CONDENSED ACID WITH TEH FLUORIDE OF SAID SOLID PARTICLES, THE IMPROVEMENT COMPRISING SUPPLYING AN AMOUNT OF ENERGY INPUT TO SAID SOLID PARTICLES THROUGHOUT ITS REACTION WITH SULFURIC ACID IN EXCESS OF 4000FT. LB. OF FEED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |