Patent US3390731A successfully refreshed from Google Patents.
US3390731A
Expired / Lapsed
US
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Weighing apparatus for belt conveyor
Assignee: Maatschappij Van Berkels Patent BV
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Filing: 1966-03-17
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Granted: 1968-07-02
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Expires: 1986-03-17
Abstract
No abstract record available.
Inventors
- 👤 Berend B Schierbeek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:04
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G01G23/37; G01G11/00; G01G11/04; G01G11/043; G01G11/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |