Patent US3494460A successfully refreshed from Google Patents.
US3494460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic conveyor and dust separator systems
Assignee: Individual
•
Filing: 1968-02-14
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Granted: 1970-02-10
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Expires: 1988-02-14
Abstract
No abstract record available.
Inventors
- 👤 Calvin Lee Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:43
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US412388A
Cited
US571473A
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GB282849A
Cited
FR704206A
Cited
FI24917A
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US2648441A
Cited
US2836256A
Cited
GB934283A
Cited
US3332218A
Cited
US3304783A
Cited
US3383841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |