Patent US2561948A successfully refreshed from Google Patents.
US2561948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminoalkylated diamino diphenyl sulfones
Assignee: Parke Davis and Co LLC
•
Filing: 1948-11-23
•
Granted: 1951-07-24
•
Expires: 1968-11-23
Abstract
No abstract record available.
Inventors
- 👤 Albert L Rawlins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:12
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/10; C07D211/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ACID ADDITION SALTS, SAID FREE BASE HAVING THE FORMULA,
Claim 2
Dependent Claim
21 words
A COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ACID ADDITION SALTS, SAID FREE BASE HAVING THE FORMULA,
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA,
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA,
References Cited (Backward Citations)
US2300677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |