US3231327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of n-dichlorophosphinylimidophosphoric trichloride
Assignee: FMC Corp
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Filing: 1961-11-13
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Granted: 1966-01-25
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Seglin Leonard
- 👤 Martin R Lutz
- 👤 Stange Hugo
Bibliographic Details
Application Number
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Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:53
CPC Classifications
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Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
THE PROCESS FOR THE PRODUCTION OF N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE COMPRISING THE STEPS OF (1) REACTING PHOSPHORUS PENTACHLORIDE WITH AMMONIUM CHLORIDE IN A LIQUID CARRYING MEDIUM SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS OXYCHLORIDE, NDICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE, AND SOLUTIONS OF PHOSPHORUS OXYCHLORIDE AND N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE, AT A TEMPERATURE IN THE RANGE OF 60* TO 105*C; (2) TREATING THE REACTION MIXTURE WITH PHOSPHORUS PENTOXIDE AT A TEMPERATURE IN THE RANGE OF 55* TO 85*C., THEREBY PRODUCING A CLEAR SOLUTION OF N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE AND PHOSPHORUS OXYCHLORIDE; AND (3) REMOVING THE PHOSPHORUS OXYCHLORIDE FROM THE SOLUTION BY DISTILLING UNDER VACUUM, THEREBY OBTAINING SUBSTANTIALLY PURE N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE.
References Cited (Backward Citations)
US2975028A
Cited
US2925320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |