US2670810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene recovery
Assignee: Union Oil Company of California
•
Filing: 1952-01-21
•
Granted: 1954-03-02
•
Expires: 1972-01-21
Abstract
No abstract record available.
Inventors
- 👤 Dorsey William Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:27
CPC Classifications
C; C10; C10L; C10L3/00; C10L3/02; C10L3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE PROCESS FOR RECOVERING ACETYLENE FROM A GAS CONTAINING THE SAME IN ADMIXTURE WITH ETHYLENE WHICH COMPRISES SRCUBBING SAID GAS WITH A SOLVENT ESSENTIALLY COMPRISING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF N-FORMYLPYRROLIDINE, N-ACETYL-PYRROLIDINE, N-FORMYL-PIPERIDINE, AND N-ACETYL PIPERIDINE.
Claim 2
Dependent Claim
39 words
THE PROCESS FOR RECOVERING ACETYLENE FROM A GAS CONTAINING THE SAME IN ADMIXTURE WITH ETHYLENE WHICH COMPRISES SRCUBBING SAID GAS WITH A SOLVENT ESSENTIALLY COMPRISING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF N-FORMYLPYRROLIDINE, N-ACETYL-PYRROLIDINE, N-FORMYL-PIPERIDINE, AND N-ACETYL PIPERIDINE.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |