Patent US2723831A successfully refreshed from Google Patents.
US2723831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum nozzle valve
Assignee: Individual
•
Filing: 1952-06-23
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Granted: 1955-11-15
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Expires: 1972-06-23
Abstract
No abstract record available.
Inventors
- 👤 Frank H Ine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:58
CPC Classifications
A; A22; A22C; A22C21/00; A22C21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US400128A
Cited
US615550A
Cited
US838479A
Cited
US911782A
Cited
US939069A
Cited
US1512431A
Cited
FR699101A
Cited
US2227578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |