US3490654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled volume systems for pneumatic discharge of powdered and granular materials and the like
Assignee: HARRY C FISCHER
•
Filing: 1968-01-22
•
Granted: 1970-01-20
•
Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 Harry C Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:08
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1165331A
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US1282697A
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US1462861A
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US1636331A
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US2059950A
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US2538756A
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US2683327A
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US2889856A
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US2879923A
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US3202320A
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US3237805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |