US3254335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reservation signalling systems
Assignee: MASTER VIDEO SYSTEMS Inc
•
Filing: 1960-07-11
•
Granted: 1966-05-31
•
Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Staten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AN ELECTRICAL SIGNALLING SYSTEM COMPRISING AN ELECTRICALLY CONTROLLED LOW IMPEDANCE SWITCH OPERATOR, AN ALTERNATE ON-OFF SWITCH UNDER THE CONTROL OF SAID SWITCH OPERATOR, A SOURCE OF ELECTRICAL ENERGY, FIRST NORMALLY OPEN SWITCH MEANS CONNECTED IN SERIES WITH SAID LOW IMPEDANCE OPERATOR ACROSS SAID SOURCE, AN ELECTRICAL INDICATING DEVICE CONNECTED IN SERIES WITH SAID ALTERNATE ON-OFF SWITCH ACROSS SAID FIRST SWITCH MEANS WHEN SAID ON-OFF SWITCH IS IN ITS ON POSITION AND SECOND NORMALLY OPEN SWITCH MEANS CONNECTED ACROSS SAID INDICATING DEVICE OPERABLE TO ENERGIZE SAID SWITCH OPERATOR WHEN SAID ON-OFF SWITCH IS IN ITS ON POSITION.
Claim 2
Dependent Claim
96 words
AN ELECTRICAL SIGNALLING SYSTEM COMPRISING AN ELECTRICALLY CONTROLLED LOW IMPEDANCE SWITCH OPERATOR, AN ALTERNATE ON-OFF SWITCH UNDER THE CONTROL OF SAID SWITCH OPERATOR, A SOURCE OF ELECTRICAL ENERGY, FIRST NORMALLY OPEN SWITCH MEANS CONNECTED IN SERIES WITH SAID LOW IMPEDANCE OPERATOR ACROSS SAID SOURCE, AN ELECTRICAL INDICATING DEVICE CONNECTED IN SERIES WITH SAID ALTERNATE ON-OFF SWITCH ACROSS SAID FIRST SWITCH MEANS WHEN SAID ON-OFF SWITCH IS IN ITS ON POSITION AND SECOND NORMALLY OPEN SWITCH MEANS CONNECTED ACROSS SAID INDICATING DEVICE OPERABLE TO ENERGIZE SAID SWITCH OPERATOR WHEN SAID ON-OFF SWITCH IS IN ITS ON POSITION.
References Cited (Backward Citations)
US870102A
Cited
US642362A
Cited
US833125A
Cited
US940444A
Cited
US1327837A
Cited
US1796668A
Cited
US1966876A
Cited
US2262458A
Cited
US2542890A
Cited
US2599623A
Cited
US2910238A
Cited
USRE24031E
Cited
US3051937A
Cited
US2987711A
Cited
US2937370A
Cited
US2980890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |