US2838509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
9-aminoalkyl-9-xanthenecarboxamides
Assignee: GD Searle LLC
•
Filing: 1956-10-02
•
Granted: 1958-06-10
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 John W Cusic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A XANTHENECARBOXAMIDE OF THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
6 words
A XANTHENECARBOXAMIDE OF THE STRUCTURAL FORMULA
Claim 3
Dependent Claim
6 words
A XANTHENECARBOXIMIDE OF THE STRUCTURAL FORMULA
Claim 4
Dependent Claim
6 words
A XANTHENECARBOXIMIDE OF THE STRUCTURAL 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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |