US2616452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic valve construction
Assignee: Skinner Chuck Co
•
Filing: 1951-03-06
•
Granted: 1952-11-04
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Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Robert B Clay
- 👤 George A Goepfrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:09
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0651
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2429149A
Cited
US2502118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |