Patent US2239691A successfully refreshed from Google Patents.
Patent US2694066A successfully refreshed from Google Patents.
US2694066A
Expired / Lapsed
US
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Lipoic acid amides of thiamine compounds
Assignee: Research Corp
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Filing: 1952-05-21
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Granted: 1954-11-09
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Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Lester J Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:53
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/38; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/848; Y10S435/849
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
BIOLOGICALLY ACTIVE SUBSTANCES OF THE GROUP CONSISTING OF A- AND B-LIPOIC ACID AMIDES OF PYRIMETHYL COMPOUNDS OF THE GROUP CONSISTING OF 2-METHYL-5-ALKOXYMETHYL-6-AMINOPYRIMIDINES, THIAMINE, THIAMINE PHOSPHATE AND THIAMINE PYROPHOSPHATE.
Claim 2
Dependent Claim
28 words
BIOLOGICALLY ACTIVE SUBSTANCES OF THE GROUP CONSISTING OF A- AND B-LIPOIC ACID AMIDES OF PYRIMETHYL COMPOUNDS OF THE GROUP CONSISTING OF 2-METHYL-5-ALKOXYMETHYL-6-AMINOPYRIMIDINES, THIAMINE, THIAMINE PHOSPHATE AND THIAMINE PYROPHOSPHATE.
Claim 3
Independent Claim
38 words
THE METHOD OF MAKING BIOLOGICALLY ACTIVE SUBSTANCES WHICH COMPRISES CONDENSING A CARBOXYLIC ACID OF THE GROUP CONSISTING OF A- AND B-LIPOIC ACIDS WITH A PYRIMETHYL COMPOUND OF THE GROUP CONSISTING OF 2-METHYL-5-ALKOXYMETHYL-6-AMINOPYRIMIDINES, THIAMINE, THIAMINE PHOSPHATE AND THIAMINE PYROPHOSPHATE.
Claim 4
Independent Claim
38 words
THE METHOD OF MAKING BIOLOGICALLY ACTIVE SUBSTANCES WHICH COMPRISES CONDENSING A CARBOXYLIC ACID OF THE GROUP CONSISTING OF A- AND B-LIPOIC ACIDS WITH A PYRIMETHYL COMPOUND OF THE GROUP CONSISTING OF 2-METHYL-5-ALKOXYMETHYL-6-AMINOPYRIMIDINES, THIAMINE, THIAMINE PHOSPHATE AND THIAMINE PYROPHOSPHATE.
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) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |