US2647900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
9-(2, 3-dihydroxypropylaminoethylamino)-acridines and their preparation
Assignee: STWB Inc
•
Filing: 1951-09-05
•
Granted: 1953-08-04
•
Expires: 1971-09-05
Abstract
No abstract record available.
Inventors
- 👤 Alexander R Surrey
- 👤 Robert K Bair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:47
CPC Classifications
C; C07; C07D; C07D219/00; C07D219/04; C07D219/08; C07D219/10; C07D219/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A 9 - (2,3 - DIHYDROXYPROPYLAMINOETHYLAMINO) ACRIDINE HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
A 9 - (2,3 - DIHYDROXYPROPYLAMINOETHYLAMINO) ACRIDINE HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |