US2537428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pikridiniem sulfo cobipounds
Assignee: —
•
Filing: —
•
Granted: 1951-01-09
•
Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:15
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/44; C07D213/52; C07D213/06; C07D213/16; C07D213/20; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A CHEMICAL COMPOUND CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
7 words
A CHEMICAL COMPOUND CORRESPONDING TO THE FORMULA:
References Cited (Backward Citations)
US2172606A
Cited
US1757441A
Cited
US2130668A
Cited
US2104728A
Cited
US2140519A
Cited
US2299782A
Cited
US2308427A
Cited
US2412117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |