US2717759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating mechanism
Assignee: Beazer East Inc
•
Filing: 1952-09-23
•
Granted: 1955-09-13
•
Expires: 1972-09-23
Abstract
No abstract record available.
Inventors
- 👤 Wilfred C Schofield
- 👤 Arthur J Whitcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:20
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1019091A
Cited
US1587869A
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US1908763A
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US2040157A
Cited
US2005891A
Cited
US2028696A
Cited
US2366734A
Cited
US2408312A
Cited
US2469786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |