US3407972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for discharging particulate solids from a vessel
Assignee: Petro Canada Exploration Inc
•
Filing: 1967-02-01
•
Granted: 1968-10-29
•
Expires: 1987-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lubomyr M O Cymbalisty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566746A
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US1597207A
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US1761240A
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US2569085A
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US2886334A
Cited
US3138335A
Cited
US3099138A
Cited
US3166222A
Cited
US3178068A
Cited
US3339808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |