US3407613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enrichment of natural gas in c2+ hydrocarbons
Assignee: Millennium Petrochemicals Inc
•
Filing: 1966-09-13
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Granted: 1968-10-29
•
Expires: 1986-09-13
Abstract
No abstract record available.
Inventors
- 👤 Werner C Muller
- 👤 Napoli Robert N Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:25
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; C; C10; C10G; C10G5/00; C10G5/06; F25J3/0228; F25J3/0233; F25J3/0238; F25J2200/00; F25J2200/02; F25J2200/70; F25J2205/00; F25J2205/02; F25J2205/04; F25J2215/00; F25J2215/02; F25J2230/00; F25J2230/60; F25J2240/00; F25J2240/40; F25J2260/00; F25J2260/60; F25J2270/00; F25J2270/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2209534A
Cited
US2535148A
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US2557171A
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US2973834A
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US3318103A
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US3285719A
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US3331214A
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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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |