Patent US2863856A successfully refreshed from Google Patents.
US2863856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamates modified with naphthenic acids
Assignee: Sunoco Inc
•
Filing: 1955-12-13
•
Granted: 1958-12-09
•
Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Stanford J Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7685
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A NEW COMPOSITION OF MATTER COMPRISING AN ESTER OF (1) AN ACID SELECTED FROM THE GROUP CONSISTING OF DICARBAMIC ACIDS AND DITHIOCARBAMIC ACIDS AND CONTAINING A HYDROCARBON RADICAL BETWEEN THE TWO NITROGENCONTAINING ACID GROUPS IN SAID ACID AND (2) A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
44 words
A NEW COMPOSITION OF MATTER COMPRISING AN ESTER OF (1) AN ACID SELECTED FROM THE GROUP CONSISTING OF DICARBAMIC ACIDS AND DITHIOCARBAMIC ACIDS AND CONTAINING A HYDROCARBON RADICAL BETWEEN THE TWO NITROGENCONTAINING ACID GROUPS IN SAID ACID AND (2) A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2333639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |