US2729681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alpha-dichloromethylbenzhydrols
Assignee: Rohm and Haas Co
•
Filing: 1954-03-08
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Granted: 1956-01-03
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Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Harold F Wilson
- 👤 W E Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
A PROCESS FOR PREPARING A-DICHLOROMETHYLDICHLOROBENZHYDROL WHICH COMPRISES REACTING 1,1-BIS(CHLOROPHENYL)-2,2-DICHLOROETHANE AND CHROMIUM TRIOXIDE IN ACETIC ACID IN THE PRESENCE OF A STRONG INORGANIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |