US3517699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic-pneumatic proximity switch
Assignee: General Equipment and Manufacturing Co Inc
•
Filing: 1967-10-20
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Granted: 1970-06-30
•
Expires: 1987-10-20
Abstract
No abstract record available.
Inventors
- 👤 Charles R Marcum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; F16; F16K; F16K31/00; F16K31/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2576168A
Cited
US2912007A
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US3164696A
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US3187127A
Cited
US3176593A
Cited
US3334655A
Cited
US3362633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |