US3480940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition indicator for appliance
Assignee: RCA Corp
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Filing: 1966-12-14
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Granted: 1969-11-25
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Expires: 1986-12-14
Abstract
No abstract record available.
Inventors
- 👤 Zeev Lieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
G; G08; G08B; G08B25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
APPARATUS FOR INDICATING INOPERATIVENESS OF AN APPLIANCE OF THE TYPE WHICH DRAWS POWER FROM A POWER SUPPLY AT DISCRETE INTERVALS THROUGH A POWER CONDUCTOR COMPRISING: A CURRENT SENSING MEANS CONNECTED TO SAID POWER CONDUCTOR, A DELAY STORAGE BATTERY, MEANS RESPONSIVE TO SAID CURRENT SENSING MEANS TO CHARGE SAID DELAY STORAGE BATTERY, MEANS TO DISCHARGE SAID DELAY STORAGE BATTERY AT A DESIRED RATE, WHEREBY THE VOLTAGE PRODUCED BY SAID DELAY STORAGE BATTERY VARIES WITH THE CHARGE THEREOF, A BLOCKABLE SIGNALLING MEANS,
Claim 2
Dependent Claim
80 words
APPARATUS FOR INDICATING INOPERATIVENESS OF AN APPLIANCE OF THE TYPE WHICH DRAWS POWER FROM A POWER SUPPLY AT DISCRETE INTERVALS THROUGH A POWER CONDUCTOR COMPRISING: A CURRENT SENSING MEANS CONNECTED TO SAID POWER CONDUCTOR, A DELAY STORAGE BATTERY, MEANS RESPONSIVE TO SAID CURRENT SENSING MEANS TO CHARGE SAID DELAY STORAGE BATTERY, MEANS TO DISCHARGE SAID DELAY STORAGE BATTERY AT A DESIRED RATE, WHEREBY THE VOLTAGE PRODUCED BY SAID DELAY STORAGE BATTERY VARIES WITH THE CHARGE THEREOF, A BLOCKABLE SIGNALLING MEANS,
References Cited (Backward Citations)
US3220206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |