Patent US2807391A successfully refreshed from Google Patents.
US2807391A
Expired / Lapsed
US
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Valved dispenser
Assignee: Virginia Smelting Co
•
Filing: 1955-05-18
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Granted: 1957-09-24
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Expires: 1975-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jr George T Wrenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:30
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/04; A; A62; A62C; A62C13/00; A62C13/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US465049A
Cited
US1324206A
Cited
US2373373A
Cited
US1995098A
Cited
US2091737A
Cited
US2694506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |