US2853266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge valve for viscous materials
Assignee: Individual
•
Filing: 1954-06-30
•
Granted: 1958-09-23
•
Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 John S Raleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:25
CPC Classifications
F; F16; F16K; F16K13/00; F16K13/02; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US574838A
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US851338A
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US1688035A
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US2000853A
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CH198785A
Cited
US2191232A
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CH259641A
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US2514551A
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GB651440A
Cited
US2745360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |