Patent US2861473A successfully refreshed from Google Patents.
US2861473A
Expired / Lapsed
US
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Portable valve operator
Assignee: Wyandotte Chemicals Corp
•
Filing: 1957-02-28
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Granted: 1958-11-25
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Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph C Allman
- 👤 Harold K Miller
- 👤 Harry F Tye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:39
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1047801A
Cited
US1384811A
Cited
US1852776A
Cited
US2041948A
Cited
US2770820A
Cited
US2709062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |