US2439668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump or compressor
Assignee: Individual
•
Filing: 1944-04-03
•
Granted: 1948-04-13
•
Expires: 1964-04-03
Abstract
No abstract record available.
Inventors
- 👤 Mercer Arthur Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:22
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/306; F04B1/122; F04B1/124; F04B1/126; F04B1/20; F04B1/2014; F04B1/2042; F04B1/205; F04B1/2064; F04B1/22; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/106; F04B23/14; F04B49/00; F04B49/22; F04B49/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR851663A
Cited
US1180190A
Cited
US1287026A
Cited
US1669976A
Cited
GB293801A
Cited
US2095255A
Cited
US2192539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |