US3359080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phosphonitrtilic chloride polymers
Assignee: Hooker Chemical Corp
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Filing: 1962-08-07
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Granted: 1967-12-19
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Expires: 1982-08-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick Arthur Ridgway
- 👤 Harold Trevor Searle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:45
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR THE PRODUCTION OF CYCLIC PHOSPHONITRILIC CHLORIDE POLYMERS WHICH COMPRISES BRINGING INTO CONTACT ELEMENTAL CHLORINE, PHOSPHORUS TRICHLORIDE AND AMMONIUM CHLORIDE IN AN INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF SYMMETRICAL TETRACHLOROETHANE, MONOCHLOROBENZENE, O-DICHLOROBENZENE, BENZYL CHLORIDE AND PHOSPHORUS OXYCHLORIDE AT REFLUX TEMPERATURE, THE AMMONIUM CHLORIDE BEING PRESENT AT ANY TIME DURING THE REACTION IN A PROPORTION WHICH IS IN A MOLECULAR EXCESS OF AT LEAST 10 PERCENT OF THE PHOSPHORUS TRICHLORIDE AND IN A STATE OF DIVISION SUCH THAT ITS SPECIFIC SURFACE IS AT LEAST 1,000 SQUARE CENTIMETERS PER GRAM, AND WHREIN THE PHOSPHORUS TRICHLORIDE IS PRESENT INITIALLY IN THE AMMONIUM CHLORIDE SOLVENT MIXTURE.
Claim 2
Dependent Claim
106 words
A PROCESS FOR THE PRODUCTION OF CYCLIC PHOSPHONITRILIC CHLORIDE POLYMERS WHICH COMPRISES BRINGING INTO CONTACT ELEMENTAL CHLORINE, PHOSPHORUS TRICHLORIDE AND AMMONIUM CHLORIDE IN AN INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF SYMMETRICAL TETRACHLOROETHANE, MONOCHLOROBENZENE, O-DICHLOROBENZENE, BENZYL CHLORIDE AND PHOSPHORUS OXYCHLORIDE AT REFLUX TEMPERATURE, THE AMMONIUM CHLORIDE BEING PRESENT AT ANY TIME DURING THE REACTION IN A PROPORTION WHICH IS IN A MOLECULAR EXCESS OF AT LEAST 10 PERCENT OF THE PHOSPHORUS TRICHLORIDE AND IN A STATE OF DIVISION SUCH THAT ITS SPECIFIC SURFACE IS AT LEAST 1,000 SQUARE CENTIMETERS PER GRAM, AND WHREIN THE PHOSPHORUS TRICHLORIDE IS PRESENT INITIALLY IN THE AMMONIUM CHLORIDE SOLVENT MIXTURE.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |