US2934561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically active salts of lysine and butane-2-sulfonic acid
Assignee: EIDP Inc
•
Filing: 1955-09-28
•
Granted: 1960-04-26
•
Expires: 1975-09-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur O Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:40
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
AN OPTICALLY ACTIVE SALT OF LYSINE AND BUTANE - 2- SULFONIC ACID.
Claim 2
Dependent Claim
12 words
AN OPTICALLY ACTIVE SALT OF LYSINE AND BUTANE - 2- SULFONIC ACID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |