US3103573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liter
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
•
Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:31
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR CONTROL OF A RESISTIVE HEATER HAVING A TEMPERATURE COEFFICIENT OF RESISTANCE TO THE EXTENT THAT TEMPERATURE CHANGES IN THE HEATER ARE REFLECTED IN MEASURABLE CHANGES OF RESISTANCE IN THE HEATER, INDEPENDENTLY OF AMBIENT TEMPERATURE COMPRISING ENERGIZING A RESISTIVE HEATER CIRCUIT; ENERGIZING AN ISOLATED MEASURING CIRCUIT; MEASURING RESISTANCE IN SAID RESISTIVE HEATER THROUGH SAID ISOLATED MEASURING CIRCUIT AND IN TERMS OF PRE-SELECTED RESISTANCE ACCOMPANYING DESIRED TEMPERATURE IN SAID RESISTIVE HEATER; AND VARYING ENERGIZATION OF SAID RESISTIVE HEATER CIRCUIT SO AS TO MAINTAIN SAID PRE-SELECTED RESISTANCE AND, THUS SAID DESIRED, TEMPERATURE IN SAID RESISTIVE HEATER.
Claim 2
Independent Claim
96 words
A METHOD FOR CONTROL OF A RESISTIVE HEATER HAVING A TEMPERATURE COEFFICIENT OF RESISTANCE TO THE EXTENT THAT TEMPERATURE CHANGES IN THE HEATER ARE REFLECTED IN MEASURABLE CHANGES OF RESISTANCE IN THE HEATER, INDEPENDENTLY OF AMBIENT TEMPERATURE COMPRISING ENERGIZING A RESISTIVE HEATER CIRCUIT; ENERGIZING AN ISOLATED MEASURING CIRCUIT; MEASURING RESISTANCE IN SAID RESISTIVE HEATER THROUGH SAID ISOLATED MEASURING CIRCUIT AND IN TERMS OF PRE-SELECTED RESISTANCE ACCOMPANYING DESIRED TEMPERATURE IN SAID RESISTIVE HEATER; AND VARYING ENERGIZATION OF SAID RESISTIVE HEATER CIRCUIT SO AS TO MAINTAIN SAID PRE-SELECTED RESISTANCE AND, THUS SAID DESIRED, TEMPERATURE IN SAID RESISTIVE HEATER.
References Cited (Backward Citations)
US1566980A
Cited
US1913580A
Cited
US2158135A
Cited
US2284863A
Cited
US2694133A
Cited
US2769076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |