Patent US3379510A successfully refreshed from Google Patents.
US3379510A
Expired / Lapsed
US
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Phosphonitrilic chloride process
Assignee: Hooker Chemical Corp
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Filing: 1962-08-14
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Granted: 1968-04-23
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Jaszka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:00
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673; C; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986; D06M11/00; D06M11/68
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
THE METHOD FOR THE PREPARATION OF CYCLIC PHOSPHONITRILIC CHLORIDE TRIMER AND TETRAMER WHICH COMPRISES (1) REACTING PHOSPHORUS PENTACHLORIDE WITH AMMONIUM CHLORIDE IN THE PRESENCE OF AN INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF HALOGENATED HYDROCARBONS AND PHOSPHORUS OXYCHLORIDE, (2) FORMING A MOVING AGITATED FILM OF THE RESULTING PRODUCT LIQUOR, (3) HEATING SAID MOVING FILM, SAID HEAT BEING APPLIED IN AN AMOUNT SUFFICIENT TO FORM (A) A VAPOR PHASE COMPRISING SAID
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |