Patent US2622965A successfully refreshed from Google Patents.
US2622965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phosphorus compounds
Assignee: International Minerals and Chemical Corp
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Filing: 1947-09-08
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Granted: 1952-12-23
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Expires: 1967-09-08
Abstract
No abstract record available.
Inventors
- 👤 Calvin M Tidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:48
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS WHICH COMPRISES HEATING A MIXTURE CONTAINING ORTHOPHOSPHORIC ACID AND AT LEAST ONE ACTIVATED CARBONACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF SAWDUST AND ACTIVATED CARBON, AT A TEMPERATURE BETWEEN ABOUT 300* AND ABOUT 500* C.; SUBSEQUENTLY HEATING THE RESULTING MIXTURE WITH CHLORINE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE BETWEEN ABOUT 250* AND ABOUT 600* C., AND RECOVERING PHOSPHORUS OXYCHLORIDE FROM THE REACTION PRODUCTS.
Claim 2
Dependent Claim
66 words
THE PROCESS WHICH COMPRISES HEATING A MIXTURE CONTAINING ORTHOPHOSPHORIC ACID AND AT LEAST ONE ACTIVATED CARBONACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF SAWDUST AND ACTIVATED CARBON, AT A TEMPERATURE BETWEEN ABOUT 300* AND ABOUT 500* C.; SUBSEQUENTLY HEATING THE RESULTING MIXTURE WITH CHLORINE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE BETWEEN ABOUT 250* AND ABOUT 600* C., AND RECOVERING PHOSPHORUS OXYCHLORIDE FROM THE REACTION PRODUCTS.
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |