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US2668003A
Expired / Lapsed
US
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Valve bag
Assignee: Arkell and Smiths
•
Filing: 1950-06-03
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Granted: 1954-02-02
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Expires: 1970-06-03
Abstract
No abstract record available.
Inventors
- 👤 Tom L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:45
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; B65D31/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2045585A
Cited
US2270842A
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US2294846A
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US2269849A
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US2392094A
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US2338254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |