US3259527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating elements for carburizing atmospheres
Assignee: Midland Ross Corp
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Filing: 1963-10-21
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Granted: 1966-07-05
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Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 Beggs Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:12
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/62; H05B3/64; C; C21; C21D; C21D1/00; C21D1/74; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20; C23C8/22; F; F27; F27D; F27D11/00; F27D11/02; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/143
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN A METHOD FOR CARBURIZING METAL WORK IN A CARBURIZING FURNACE WHICH INCLUDES HEATING THE FURNACE AND THE WORK BY PASSING ELECTRICAL POWER THROUGH A METALLIC ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND OPPOSED MAJOR SURFACES THE IMPROVEMENT COMPRISING MAINTAINING AT CARBURIZING ATMOSHPERE WITHIN THE FURNACE IN CONTACT WITH THE FIRST MAJOR SURFACE OF THE HEATING ELEMENT, CONTROLLING THE CARBON POTENTIAL OF THE ATMOSPHERE TO ACCOMPLISH A PRESCRIBED CARBURIZING TREATMENT AND MAINTAINING IN CONTACCT WITH THE SECOND MAJOR SURFACE OF THE HEATING ELEMENT A MEDIUM HAVING A CARBON POTENTIAL AT LEAST 0.5 LESS THAN THAT OF THE ATMOSHPERE.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |