Patent US3844472A successfully refreshed from Google Patents.
Patent US2046883A successfully refreshed from Google Patents.
US2901475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemotherapeutic salts
Assignee: WR Grace and Co
•
Filing: 1957-03-04
•
Granted: 1959-08-25
•
Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 Rudner Bernard
- 👤 Tockman Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:44
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/76; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/50; C07D277/52; C07D295/00; C07D295/22; C07D295/28; C07D295/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
AS A NEW CHEMICAL COMPOUND THE 1, 1 -DIMETHYL-1OCTADECYLHYDRAZINIUM SALT OF SULFATHIAZOLE
Claim 2
Dependent Claim
12 words
AS A NEW CHEMICAL COMPOUND THE 1, 1 -DIMETHYL-1OCTADECYLHYDRAZINIUM SALT OF SULFATHIAZOLE
Claim 3
Dependent Claim
7 words
NEW CHEMOTHERAPEUTIC SALTS HAVING THE FOLLOWING STRUCTURE
Claim 4
Dependent Claim
7 words
NEW CHEMOTHERAPEUTIC SALTS HAVING THE FOLLOWING STRUCTURE
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |