US2705460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic attachment for oil pumps
Assignee: Individual
•
Filing: 1951-01-26
•
Granted: 1955-04-05
•
Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Harl C Burdick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:04
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B47/00; F04B47/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1931937A
Cited
US1867092A
Cited
US2170206A
Cited
US2328496A
Cited
US2437456A
Cited
US2496060A
Cited
US2535680A
Cited
US2498990A
Cited
US2559864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |