US2813866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
8-r-1, 6, 8-triazabicyclo(4, 3, 0)-3-nonene-7, 9-diones and preparation thereof
Assignee: STWB Inc
•
Filing: 1955-06-10
•
Granted: 1957-11-19
•
Expires: 1975-06-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:32
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN 8-R-1,6,8-TRIAZABICYCLO(4,3,0) -3- NONENE- 7,9DIONE, HAVING THE FORMULA
Claim 2
Dependent Claim
8 words
AN 8-R-1,6,8-TRIAZABICYCLO(4,3,0) -3- NONENE- 7,9DIONE, HAVING THE FORMULA
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |