US2769321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ethylene from a gaseous mixture
Assignee: MW Kellogg Co
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Filing: 1952-08-07
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Granted: 1956-11-06
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Expires: 1972-08-07
Abstract
No abstract record available.
Inventors
- 👤 Stiles Samuel Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:56
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; C; C07; C07C; C07C7/00; C07C7/04; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0252; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/04; F25J2210/12; F25J2215/00; F25J2215/02; F25J2215/62; F25J2230/00; F25J2230/20; F25J2270/00; F25J2270/04; F25J2270/12; F25J2270/60; F25J2270/90; F25J2270/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
IN A PROCESS FOR RECOVERING ETHYLENE FROM A MIXTURE OF LOW BOILING GASES, IN WHICH SAID LOW BOILING MIXTURE
Claim 2
Dependent Claim
19 words
IN A PROCESS FOR RECOVERING ETHYLENE FROM A MIXTURE OF LOW BOILING GASES, IN WHICH SAID LOW BOILING MIXTURE
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |