US2539428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3, 3'-dithiolisobutyric acid
Assignee: Individual
•
Filing: 1949-04-15
•
Granted: 1951-01-30
•
Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Jansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:42
CPC Classifications
C; C07; C07C; C07C323/00; C07C323/50; C07C323/51; C07C323/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2183860A
Cited
US2477327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |