US3249611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel method for the preparation of phthalazines
Assignee: Individual
•
Filing: 1965-03-31
•
Granted: 1966-05-03
•
Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Hirsch Arthur
- 👤 Orphanos Dimitrlus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:33
CPC Classifications
C; C07; C07D; C07D237/00; C07D237/26; C07D237/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
PROCESS FOR THE PRODUCTION OF A HETEROCYCLIC COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
11 words
PROCESS FOR THE PRODUCTION OF A HETEROCYCLIC COMPOUND 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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |