Patent US4605826A successfully refreshed from Google Patents.
Patent US3023086A successfully refreshed from Google Patents.
US3023086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing phosphorus pentasulfide of controlled reactivity
Assignee: Occidental Chemical Corp
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Filing: 1959-05-27
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Granted: 1962-02-27
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Expires: 1979-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robota Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
C; C01; C01B; C01B25/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A PROCESS FOR CONTROLLING THE REACTIVITY OF PHOSPHORUS PENTASULFIDE WHICH COMPRISES CONTROLLING THE COOLING OF MOLTEN PHOSPHORUS PENTASULFIDE THROUGH THE TEMPERATURE RANGE OF FROM ABOUT TWO HUNDRED EIGHTY DEGREES CENTIGRADE TO TWO HUNDRED SIXTY DEGREES CENTIGRADE FOR A TIME INTERVAL BETWEEN ABOUT 0.125 SECOND AND ABOUT 2.5 MINUTES.
Claim 2
Dependent Claim
48 words
A PROCESS FOR CONTROLLING THE REACTIVITY OF PHOSPHORUS PENTASULFIDE WHICH COMPRISES CONTROLLING THE COOLING OF MOLTEN PHOSPHORUS PENTASULFIDE THROUGH THE TEMPERATURE RANGE OF FROM ABOUT TWO HUNDRED EIGHTY DEGREES CENTIGRADE TO TWO HUNDRED SIXTY DEGREES CENTIGRADE FOR A TIME INTERVAL BETWEEN ABOUT 0.125 SECOND AND ABOUT 2.5 MINUTES.
Claim 3
Dependent Claim
68 words
A PROCESS FOR PRODUCING PHOSPHORUS PENTASULFIDE OF CONTROLLED REACTIVITY WHICH COMPRISES REACTING MOLTEN PHOSPHORUS WITH SULFUR IN APPROXIMATELY THE STOICHIOMETRIC PROPORTIONS NECESSARY TO FORM PHOSPHORUS PENTASULFIDE, AND COOLING THE MOLTEN REACTION MIXTURE TO YIELD SOLID PHOSPHORUS PENTASULFIDE, SAID COOLING STEP COMPRISING A CONTROLLED COOLING OF THE PHOSPHORUS PENTASULFIDE REACTION MIXTURE THROUGH THE LIQUID-SOLID PHASE TRANSITION RANGE FOR A TIME INTERVAL BETWEEN ABOUT 0.125 SECOND AND ABOUT 2.5 MINUTES.
Claim 4
Dependent Claim
68 words
A PROCESS FOR PRODUCING PHOSPHORUS PENTASULFIDE OF CONTROLLED REACTIVITY WHICH COMPRISES REACTING MOLTEN PHOSPHORUS WITH SULFUR IN APPROXIMATELY THE STOICHIOMETRIC PROPORTIONS NECESSARY TO FORM PHOSPHORUS PENTASULFIDE, AND COOLING THE MOLTEN REACTION MIXTURE TO YIELD SOLID PHOSPHORUS PENTASULFIDE, SAID COOLING STEP COMPRISING A CONTROLLED COOLING OF THE PHOSPHORUS PENTASULFIDE REACTION MIXTURE THROUGH THE LIQUID-SOLID PHASE TRANSITION RANGE FOR A TIME INTERVAL BETWEEN ABOUT 0.125 SECOND AND ABOUT 2.5 MINUTES.
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |