Patent US2923732A successfully refreshed from Google Patents.
US2923732A
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Process for making quinitol bis-chloroformate
Assignee: Dow Chemical Co
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Filing: 1957-05-20
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Granted: 1960-02-02
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
C; C07; C07C; C07C35/00; C07C35/02; C07C35/08; C07C35/14; C07C68/00; C07C68/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR PRODUCING QUINITOL BIS-CHLOROFORMATE COMPRISING MIXING ONE MOLAR EQUIVALENT OF TRANS-QUINITOL AND AT LEAST ABOUT 3 MOLAR EQUIVALENTS OF PHOSGENE WITH AT LEAST AN EQUAL VOLUME OF A SATURATED, ACYCLIC, ALIPHATIC KETONE CONTAINING 3 TO 6 CARBON ATOMS, MAINTAINING THE TEMPERATURE OF THE MIXTURE AT ABOUT 0 TO 65* C. UNTIL SUBSTANTIAL REACTION HAS OCCURRED AND RECOVERING THE THUS FORMED QUINITOL BIS-CHLOROFORMATE FROM THE MIXTURE.
Claim 2
Dependent Claim
67 words
A PROCESS FOR PRODUCING QUINITOL BIS-CHLOROFORMATE COMPRISING MIXING ONE MOLAR EQUIVALENT OF TRANS-QUINITOL AND AT LEAST ABOUT 3 MOLAR EQUIVALENTS OF PHOSGENE WITH AT LEAST AN EQUAL VOLUME OF A SATURATED, ACYCLIC, ALIPHATIC KETONE CONTAINING 3 TO 6 CARBON ATOMS, MAINTAINING THE TEMPERATURE OF THE MIXTURE AT ABOUT 0 TO 65* C. UNTIL SUBSTANTIAL REACTION HAS OCCURRED AND RECOVERING THE THUS FORMED QUINITOL BIS-CHLOROFORMATE FROM THE MIXTURE.
References Cited (Backward Citations)
US2370570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |