US2439957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump for liquefied gases
Assignee: Air Products Inc
•
Filing: 1943-10-21
•
Granted: 1948-04-20
•
Expires: 1963-10-21
Abstract
No abstract record available.
Inventors
- 👤 Carl R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:44
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B15/00; F04B15/06; F04B15/08; F04B53/08; F04B53/16; F04B53/162; F04B53/164; Y; Y10; Y10S; Y10S417/00; Y10S417/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US144390A
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US1552281A
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US1879370A
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US2292375A
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US2292617A
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US2330781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |