Patent US3073940A successfully refreshed from Google Patents.
US3073940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for heating appliances
Assignee: Individual
•
Filing: 1961-02-03
•
Granted: 1963-01-15
•
Expires: 1981-02-03
Abstract
No abstract record available.
Inventors
- 👤 Brandl Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:23
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0208; A; A47; A47J; A47J27/00; A47J27/21; A47J27/21008; A47J27/21058; H01; H01H; H01H35/00; H01H35/24; H01H35/32; H01H37/00; H01H37/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A SAFETY DEVICE FOR A HEATING APPLIANCE COMPRISING IN COMBINATION: A VESSEL IN OPERATION EVACUATED AND PARTLY FILLED WITH AN EVAPORATABLE LIQUID, AN ELECTRIC HEATING ELEMENT ARRANGED IN THE SAID VESSEL SUBMERGED IN THE SAID LIQUID, AN EXPANSIBLE MEMBER RESPONSIVE TO THE PRESSURE PREVAILING INSIDE THE SAID VESSEL, A PRIMARY SWITCH ELECTRICALLY CONNECTED TO THE SAID HEATING ELEMENT AND OPERATIVELY CONNECTED TO THE SAID EXPANSIBLE MEMBER IN THE SENSE OF BEING SWITCHED OFF BY THE EXPANSION THEREOF,
Claim 2
Dependent Claim
77 words
A SAFETY DEVICE FOR A HEATING APPLIANCE COMPRISING IN COMBINATION: A VESSEL IN OPERATION EVACUATED AND PARTLY FILLED WITH AN EVAPORATABLE LIQUID, AN ELECTRIC HEATING ELEMENT ARRANGED IN THE SAID VESSEL SUBMERGED IN THE SAID LIQUID, AN EXPANSIBLE MEMBER RESPONSIVE TO THE PRESSURE PREVAILING INSIDE THE SAID VESSEL, A PRIMARY SWITCH ELECTRICALLY CONNECTED TO THE SAID HEATING ELEMENT AND OPERATIVELY CONNECTED TO THE SAID EXPANSIBLE MEMBER IN THE SENSE OF BEING SWITCHED OFF BY THE EXPANSION THEREOF,
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |