US2956064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 4-benzodioxepin-2, 5-(3h)-dione
Assignee: Pharmacia and Upjohn Co
•
Filing: 1958-08-13
•
Granted: 1960-10-11
•
Expires: 1978-08-13
Abstract
No abstract record available.
Inventors
- 👤 Kagan Fred
- 👤 Robert D Birkenmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
C; C07; C07D; C07D321/00; C07D321/02; C07D321/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
1,4-BENZODIOXEPIN-2,5-(3H)-DIONE.
Claim 2
Dependent Claim
1 words
1,4-BENZODIOXEPIN-2,5-(3H)-DIONE.
Claim 3
Dependent Claim
44 words
A PROCESS FOR THE PREPARATION OF 1,4-BENZODIOXEPIN2,5-(3H)-DIONE WHICH COMPRISES DEHYDROHALOGENATING IODOACETYLSALICYLIC ACID WITH AN ACID-ACCEPTING TERTIARY AMINE UNDER ANHYDROUS CONDITIONS IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AT A TEMPERATURE WITHIN THE RANGE OF ABOUT ZERO DEGREES CENTIGRADE TO ABOUT EIGHTY DEGREES CENTIGRADE.
Claim 4
Dependent Claim
44 words
A PROCESS FOR THE PREPARATION OF 1,4-BENZODIOXEPIN2,5-(3H)-DIONE WHICH COMPRISES DEHYDROHALOGENATING IODOACETYLSALICYLIC ACID WITH AN ACID-ACCEPTING TERTIARY AMINE UNDER ANHYDROUS CONDITIONS IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AT A TEMPERATURE WITHIN THE RANGE OF ABOUT ZERO DEGREES CENTIGRADE TO ABOUT EIGHTY DEGREES CENTIGRADE.
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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |