US2585972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of diquaternary salts of pyrimidylaminoquinolines
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1949-11-03
•
Granted: 1952-02-19
•
Expires: 1969-11-03
Abstract
No abstract record available.
Inventors
- 👤 Stacey Gilbert Joseph
- 👤 Thompson Henry William
- 👤 Vasey Charles Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:30
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
PROCESS FOR THE MANUFACTURE OF DIQUATERNARY SALTS OF PYRIMIDYLAMINOQUINOLINES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
PROCESS FOR THE MANUFACTURE OF DIQUATERNARY SALTS OF PYRIMIDYLAMINOQUINOLINES HAVING 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 |