US2980716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing 6, 8-dihalooctanoic esters
Assignee: Research Corp
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Filing: 1954-06-11
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Granted: 1961-04-18
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Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Lester J Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:23
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/01; C07C59/115; C07D; C07D339/00; C07D339/02; C07D339/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD WHICH COMPRISES TREATING WITH A ALKALI METAL BOROHYDRIDE AN ESTER OF THE GROUP CONSISTING OF 8-CHLORO-6-OCOOCTANIC LOWER ALKYL ESTERS, 8-BROMO-6OCOOCTONOIC LOWER ALKYL ESTER AND 6-OXO (-OCTENOIC LOWER ALKYL ESTERS TO REDUCE THE 6-OXO GROUP TO HYDROXYL, AND TREATING THE L-HYDROXYL COMPOUND THEREBY PRODUCED WITH A HALOGENERATING AGENT SELECTED FROM THE GROUP CONSISTING OF INORGANIC ACYL CHLORIDE AND BROMIDES TO REPLACE THE 6-HYDROXYL WITH A HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE.
Claim 2
Independent Claim
76 words
THE METHOD WHICH COMPRISES TREATING WITH A ALKALI METAL BOROHYDRIDE AN ESTER OF THE GROUP CONSISTING OF 8-CHLORO-6-OCOOCTANIC LOWER ALKYL ESTERS, 8-BROMO-6OCOOCTONOIC LOWER ALKYL ESTER AND 6-OXO (-OCTENOIC LOWER ALKYL ESTERS TO REDUCE THE 6-OXO GROUP TO HYDROXYL, AND TREATING THE L-HYDROXYL COMPOUND THEREBY PRODUCED WITH A HALOGENERATING AGENT SELECTED FROM THE GROUP CONSISTING OF INORGANIC ACYL CHLORIDE AND BROMIDES TO REPLACE THE 6-HYDROXYL WITH A HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |