US3420068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a fluid rich in methane from liquefied natural gas under a low initial pressure
Assignee: Air Liquide SA
•
Filing: 1967-08-28
•
Granted: 1969-01-07
•
Expires: 1987-08-28
Abstract
No abstract record available.
Inventors
- 👤 Pierre Petit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:43
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/063; F25J3/064; F17; F17C; F17C9/00; F17C9/02; F17C9/04; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0214; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0605; F25J3/061; F25J3/0615; F25J3/0635; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2265/00; F17C2265/01; F17C2265/015; F25J2200/00; F25J2200/02; F25J2200/50; F25J2200/70; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/06; F25J2210/62; F25J2235/00; F25J2235/60; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/66; F25J2270/90; F25J2270/904; F25J2270/908
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |