US2512916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for effecting expansion of gas
Assignee: L T SEPIN
•
Filing: 1943-04-09
•
Granted: 1950-06-27
•
Expires: 1963-04-09
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:06
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1752277A
Cited
FR673605A
Cited
GB377736A
Cited
DE552672C
Cited
US1835887A
Cited
US2222236A
Cited
US2263522A
Cited
US2090590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |