US2447741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid oxygen pump
Assignee: Individual
•
Filing: 1944-12-12
•
Granted: 1948-08-24
•
Expires: 1964-12-12
Abstract
No abstract record available.
Inventors
- 👤 Baufre William Lane De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:53
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B15/00; F04B15/06; F04B15/08; F04B53/14; F04B53/143; F04B53/16; F04B53/162; F04B53/164; F04B9/00; F04B9/02; Y; Y10; Y10S; Y10S417/00; Y10S417/901
Claims Analysis
Total Claims: 0
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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) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |