US2888175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary seal valve
Assignee: GREAT LAKES CARBON Corp
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Filing: 1957-02-26
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Granted: 1959-05-26
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Milo A Harrison
- 👤 Jerry C Kovarik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |