US3039827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock duster
Assignee: Consolidation Coal Co
•
Filing: 1959-09-22
•
Granted: 1962-06-19
•
Expires: 1979-09-22
Abstract
No abstract record available.
Inventors
- 👤 William N Poundstone
- 👤 Vincent H Ream
- 👤 Sam A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
E; E21; E21F; E21F5/00; E21F5/08; E21F5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734782A
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US2735725A
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US2116603A
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US2565835A
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US2527455A
Cited
US2723054A
Cited
US2791472A
Cited
US2781234A
Cited
US2813702A
Cited
US2915337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |