Patent US2816134A successfully refreshed from Google Patents.
US2816134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of chlorinated aromatic carboxylic acid esters
Assignee: California Research LLC
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Filing: 1955-07-05
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Granted: 1957-12-10
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:22
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
PROCESS FOR THE PREPARATION OF A CHLORINATED AROMATIC CARBOXYLIC ACID ESTER, WHICH COMPRISES CONTACTING AN AROMATIC CARBOXYLIC ACID ESTER WITH CHLORINE AT A TEMPERATURE ABOVE ABOUT 0*F. BUT BELOW ABOUT 300*F. FOR A PERIOD OF TIME SUFFICIENT TO CHLORINATE THE ALCOHOL PORTION OF THE ESTER.
Claim 2
Dependent Claim
45 words
PROCESS FOR THE PREPARATION OF A CHLORINATED AROMATIC CARBOXYLIC ACID ESTER, WHICH COMPRISES CONTACTING AN AROMATIC CARBOXYLIC ACID ESTER WITH CHLORINE AT A TEMPERATURE ABOVE ABOUT 0*F. BUT BELOW ABOUT 300*F. FOR A PERIOD OF TIME SUFFICIENT TO CHLORINATE THE ALCOHOL PORTION OF THE ESTER.
References Cited (Backward Citations)
US1866849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |