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US2623066A
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Preparation of beta, beta-dithio dicarboxylic acids and esters
Assignee: RALPH L EVANS
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Filing: 1948-06-15
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Granted: 1952-12-23
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Expires: 1968-06-15
Abstract
No abstract record available.
Inventors
- 👤 James G Murphy
- 👤 John F Mulvaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:59
CPC Classifications
A; A61; A61Q; A61Q9/00; A61Q9/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61Q5/00; A61Q5/04; C; C07; C07C; C07C319/00; C07C319/02; C07C319/22; C07C319/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR THE PRODUCTION OF A BETA-BETA'' DITHIODICARBOXYLIC ACID AND ESTERS THEREOF COMPRISING REACTING ONE MOLE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA, BETA ETHYLENICALLY UNSATURATED CARBOXYLIC ACIDS AND ESTERS OF SAID UNSATURATED ACIDS WITH AT LEAST ONE-HALF MOLE OF A COMPOUND WHICH IS A SOURCE OF POLYSULFIDE IONS, SAID REACTION TAKING PLACE AT ROOM TEMPERATURE OR ABOVE.
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE PRODUCTION OF A BETA-BETA'' DITHIODICARBOXYLIC ACID AND ESTERS THEREOF COMPRISING REACTING ONE MOLE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA, BETA ETHYLENICALLY UNSATURATED CARBOXYLIC ACIDS AND ESTERS OF SAID UNSATURATED ACIDS WITH AT LEAST ONE-HALF MOLE OF A COMPOUND WHICH IS A SOURCE OF POLYSULFIDE IONS, SAID REACTION TAKING PLACE AT ROOM TEMPERATURE OR ABOVE.
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |