Patent US3058488A successfully refreshed from Google Patents.
US3058488A
Expired / Lapsed
US
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Rotary valves
Assignee: Coal Industry Patents Ltd
•
Filing: 1959-01-28
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Granted: 1962-10-16
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Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 Hirst Arthur Algernon
- 👤 Burns Alan Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:21
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633; B03; B03B; B03B5/00; B03B5/02; B03B5/10; B03B5/24; F; F16; F16K; F16K5/00; F16K5/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86662; Y10T137/86863; Y10T137/86871; Y10T137/87169; Y10T137/87265; Y10T137/87322; Y10T137/87523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1132899A
Cited
US1910004A
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US1830067A
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US2215728A
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US2199821A
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US2319347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |