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US2837377A
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Automatic regulating device for pneumatic conveyors
Assignee: DUNBAR KAPPLE Inc
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Filing: 1954-07-06
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Granted: 1958-06-03
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Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 James F Finnegan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:04
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US426649A
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US539325A
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US717642A
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US850716A
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US1494996A
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DE684810C
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US2512211A
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FR1066660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |