Patent US4574754A successfully refreshed from Google Patents.
Patent US2706491A successfully refreshed from Google Patents.
US2706491A
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Single and multi-ring valves
Assignee: Individual
•
Filing: 1949-11-08
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Granted: 1955-04-19
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Expires: 1969-11-08
Abstract
No abstract record available.
Inventors
- 👤 Kohler Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:41
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/08; F16K15/10; F16K15/06; F16K15/063; F16K15/064; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7559; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7861; Y10T137/7862; Y10T137/7863; Y10T137/7864; Y10T137/7904; Y10T137/7922; Y10T137/7929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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US1176632A
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US1654320A
Cited
AT142741B
Cited
US2062816A
Cited
AT142742B
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US2297943A
Cited
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Cited
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Cited
US2516236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |