Patent US2688642A successfully refreshed from Google Patents.
US2688642A
Expired / Lapsed
US
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Process for the manufacture of dichloropropenes
Assignee: Dow Chemical Co
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Filing: 1948-12-01
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Granted: 1954-09-07
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Expires: 1968-12-01
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Partansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR CHLORINATING A MATERIAL FROM THE CLASS CONSISTING OF PROPYLENE, MONOCHLOROPROPENES AND MIXTURES THEREOF TO PRODUCE A HIGH YIELD OF DICHLOROPENES WITHOUT SUBSTANTIAL FORMATION OF TAR, WHICH COMPRISES FORMING A MIXTURE OF THE MATERIAL TO BE CHLORINATED, CHLORINE AND WATER VAPOR PREHEATED TO A TEMPERATURE BETWEEN 100* AND 400* C., IN WHICH THE PROPORTION OF CHLORINE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
62 words
A PROCESS FOR CHLORINATING A MATERIAL FROM THE CLASS CONSISTING OF PROPYLENE, MONOCHLOROPROPENES AND MIXTURES THEREOF TO PRODUCE A HIGH YIELD OF DICHLOROPENES WITHOUT SUBSTANTIAL FORMATION OF TAR, WHICH COMPRISES FORMING A MIXTURE OF THE MATERIAL TO BE CHLORINATED, CHLORINE AND WATER VAPOR PREHEATED TO A TEMPERATURE BETWEEN 100* AND 400* C., IN WHICH THE PROPORTION OF CHLORINE CORRESPONDS TO THE FORMULA
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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |