US2585935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary salts of pyrimidylaminocinnolines and process of preparing same
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1949-11-03
•
Granted: 1952-02-19
•
Expires: 1969-11-03
Abstract
No abstract record available.
Inventors
- 👤 Hepworth Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:36
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/02; C07D403/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
AS NEW COMPOUNDS, THE QUATERNARY SALTS OF THE CINNOLINE DERIVATIVES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
AS NEW COMPOUNDS, THE QUATERNARY SALTS OF THE CINNOLINE DERIVATIVES OF THE GENERAL 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) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |