US2679145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative method and apparatus for liquefying natural gas
Assignee: Union Stock Yard and Transit Co
•
Filing: 1951-12-08
•
Granted: 1954-05-25
•
Expires: 1971-12-08
Abstract
No abstract record available.
Inventors
- 👤 Harold F Hagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:19
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0032; F25J1/0035; F25J1/004; F25J1/02; F25J1/0201; F25J1/0202; F25J1/0243; F25J1/0279; F25J1/0281; F25J1/0283; F25J1/0285; F25J2230/00; F25J2230/20
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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |