US2920653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve apparatus
Assignee: Individual
•
Filing: 1954-07-16
•
Granted: 1960-01-12
•
Expires: 1974-07-16
Abstract
No abstract record available.
Inventors
- 👤 Charles J Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839; Y10T137/86879; Y10T137/86895; Y10T137/87265; Y10T137/87322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US261224A
Cited
US1814678A
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US1967851A
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US2086868A
Cited
US2503827A
Cited
US2601588A
Cited
US2654392A
Cited
US2641281A
Cited
US2674472A
Cited
US2751183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |