US2884000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated air injector
Assignee: MARVIN R SAUNDERS
•
Filing: 1958-04-01
•
Granted: 1959-04-28
•
Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Melvin L Witter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0638; G05D16/0641; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/3133; Y10T137/3137
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2650606A
Cited
US2822121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |