Patent US3256404A successfully refreshed from Google Patents.
US3256404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switching devices
Assignee: Motors Liquidation Co
•
Filing: 1963-11-06
•
Granted: 1966-06-14
•
Expires: 1983-11-06
Abstract
No abstract record available.
Inventors
- 👤 Stanley F Newman
- 👤 Sanford H Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:57
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/284; H01H51/285
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A SWITCHING DEVICE COMPRISING A MAGNETICALLY RESPONSIVE REED SWITCH AND MEANS DETERMINING THE CONDITION OF THE SWITCH, THE DETERMINING MEANS INCLUDING A MEMBER OF MAGNETIC MATERIAL HAVING A PAIR OF CONTINUOUS FLUX PATHS THEREIN PROVIDED WITH A COMMON BRANCH, THE REED SWITCH ARRANGED IN CLOSE PROXIMITY TO THE MEMBER AND ALSO TO THE COMMON BRANCH SO AS TO BE RESPONSIVE TO THE FLUX FLOW IN THE COMMON BRANCH AND THEREBY INFLUENCED BY THE AMOUNT OF FLUX FLOWING THERETHROUGH, A PLURALITY OF INDUCTIVE WINDINGS COUPLED TO THE MEMBER, AND MEANS SELECTIVELY ENERGIZING THE PLURALITY OF WINDINGS SO S TO GENERATE DIFFERENT FLUX FLOWS IN THE PATHS AND THEREBY ALTER THE MAGNETIC IMPEDANCE OF THE COMMON BRANCH AND ACCORDINGLY THE CONDITION OF THE REED SWITCH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |