US2767182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of n-alkylating compounds having reactive imino groups
Assignee: C.H. Boehringer Sohn AG and Co KG
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Filing: 1954-08-09
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Granted: 1956-10-16
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Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Konz Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:40
CPC Classifications
C; C07; C07D; C07D227/00; C07D227/02; C07D227/06; C07D227/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
THE PROCESS OF N-ALKYLATING THE IMIDO GROUPS IN HETEROCYCLIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF URIC ACID, 2,4-DIKETO-TETRAHYDROQUINAZOLINE, URACIL, DIALKYL-BARBITURIC ACIDS, ALLOXAN, PARABANIC ACID, ISATIN, APYRIDONE, A-QUINAZOLONES, B-QUINAZOLONES AND PURINE-TYPE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF XANTHINE, HYPOXANTHINE, 1,3-DIETHYL XANTHINE, 3-ETHYL XANTHINE AND 1,7-DIMETHYL XANTHINE, WHICH COMPRISES REACTING SAID HETEROCYCLIC COMPOUNDS WITH A LOWER CAPROLACTIM-O-ALKYL ETHER AT TEMPERATURES RANGING FROM ABOUT 100* C. TO ABOUT 165* C.
Claim 2
Dependent Claim
69 words
THE PROCESS OF N-ALKYLATING THE IMIDO GROUPS IN HETEROCYCLIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF URIC ACID, 2,4-DIKETO-TETRAHYDROQUINAZOLINE, URACIL, DIALKYL-BARBITURIC ACIDS, ALLOXAN, PARABANIC ACID, ISATIN, APYRIDONE, A-QUINAZOLONES, B-QUINAZOLONES AND PURINE-TYPE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF XANTHINE, HYPOXANTHINE, 1,3-DIETHYL XANTHINE, 3-ETHYL XANTHINE AND 1,7-DIMETHYL XANTHINE, WHICH COMPRISES REACTING SAID HETEROCYCLIC COMPOUNDS WITH A LOWER CAPROLACTIM-O-ALKYL ETHER AT TEMPERATURES RANGING FROM ABOUT 100* C. TO ABOUT 165* C.
Claim 3
Dependent Claim
27 words
THE PROCESS OF ALKYLATING IMIDO GROUPS IN URIC ACID WHICH COMPRISES REACTING URIC ACID WITH A LOWER CAPROLACTIM-O-ALKYL ETHER AT AT A TEMPERATURE OF ABOUT 155* C.
Claim 4
Dependent Claim
27 words
THE PROCESS OF ALKYLATING IMIDO GROUPS IN URIC ACID WHICH COMPRISES REACTING URIC ACID WITH A LOWER CAPROLACTIM-O-ALKYL ETHER AT AT A TEMPERATURE OF ABOUT 155* C.
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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |