US2851486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of succinic acids
Assignee: Lonza Electric and Chemical Works Ltd
•
Filing: 1956-03-23
•
Granted: 1958-09-09
•
Expires: 1976-03-23
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Pino Piero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:55
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PREPARATION OF COMPOUNDS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PREPARATION OF COMPOUNDS OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2562393A
Cited
US2604490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |