Patent US3102787A successfully refreshed from Google Patents.
US3102787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrogen fluoride
Assignee: EIDP Inc
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Filing: 1960-07-13
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Granted: 1963-09-03
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Expires: 1980-07-13
Abstract
No abstract record available.
Inventors
- 👤 Mcmillan Donald
- 👤 Charles C Quarles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:04
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191; C01B7/192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A PROCESS FOR PRODUCING HYDROGEN FLUORIDE, THE STEP COMPRISING CONTACTING A BED OF METAL FLUORIDE, SAID METAL FLUORIDE BEING SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL FLUORIDES AND ALKALINE EARTH METAL FLUORIDES, WITH A MOVING STREAM OF SULFURIC ACID VAPOR, SULFUR TRIOXIDE VAPOR AND WATER VAPOR, WHILE MAINTAINING THE TEMPERATURE WITHIN THE RANGE FROM 100*C. TO THE BOILING POINT OF SULFURIC ACID AT THE PRESSURE USED, AND CONTINUOUSLY MAINTAINING ON THE SURFACE OF SAID METAL FLUORIDE A LIQUID PHASE OF CONDENSED SULFURIC ACID.
Claim 2
Dependent Claim
85 words
IN A PROCESS FOR PRODUCING HYDROGEN FLUORIDE, THE STEP COMPRISING CONTACTING A BED OF METAL FLUORIDE, SAID METAL FLUORIDE BEING SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL FLUORIDES AND ALKALINE EARTH METAL FLUORIDES, WITH A MOVING STREAM OF SULFURIC ACID VAPOR, SULFUR TRIOXIDE VAPOR AND WATER VAPOR, WHILE MAINTAINING THE TEMPERATURE WITHIN THE RANGE FROM 100*C. TO THE BOILING POINT OF SULFURIC ACID AT THE PRESSURE USED, AND CONTINUOUSLY MAINTAINING ON THE SURFACE OF SAID METAL FLUORIDE A LIQUID PHASE OF CONDENSED SULFURIC ACID.
References Cited (Backward Citations)
US1316569A
Cited
US1665588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |