Patent US3304399A successfully refreshed from Google Patents.
US3304399A
Expired / Lapsed
US
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High-frequency furnace for high-frequency heating by means of ultra-high frequencies
Assignee: US Philips Corp
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Filing: 1964-03-10
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Granted: 1967-02-14
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 Timmerma Franciscus Hendricus
- 👤 Helm Johan Posthuma Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:19
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
HIGH-FREQUENCY HEATING APPARATUS COMPRISING FIRST AND SECOND GROUPS OF HEATING UNITS SEQUENTIALLY ARRANGED IN THE PATH OF AN OBJECT TO BE HEATED, EACH OF SAID HEATING UNITS COMPRISING A WAVEGUIDE STRUCTURE HAVING A PLURALITY OF SPACED PARTITION MEMBERS EXTENDING TRANSVERSELY TO SAID PATH AND ARRANGED TO FORM A PLURALITY OF ADJACENT WAVEGUIDE SECTIONS INTERCONNECTED TO DEFINE A SERPENTINE PATH FOR HIGH-FREQUENCY ENERGY, EACH OF SAID PARTITION MEMBERS HAVING AN APERTURE THEREIN TO FORM A CHANNEL FOR THE PASSAGE OF SAID OBJECT, A PLURALITY OF HIGH-FREQUENCY GENERATORS COUPLED TO INDIVIDUAL ONES OF THE HEATING UNITS OF SAID FIRST GROUP, AND MEANS FOR COUPLING THE HEATING UNITS OF SAID FIRST GROUP TO INDIVIDUAL ONES OF THE HEATING UNITS OF SAID SECOND GROUP THEREBY FORMING A HIGH-FREQUENCY ENERGY PROPAGATION PATH FOR EACH GENERATOR COMPRISING A HEATING UNIT OF EACH OF SAID FIRST AND SECOND GROUPS.
Claim 2
Dependent Claim
142 words
HIGH-FREQUENCY HEATING APPARATUS COMPRISING FIRST AND SECOND GROUPS OF HEATING UNITS SEQUENTIALLY ARRANGED IN THE PATH OF AN OBJECT TO BE HEATED, EACH OF SAID HEATING UNITS COMPRISING A WAVEGUIDE STRUCTURE HAVING A PLURALITY OF SPACED PARTITION MEMBERS EXTENDING TRANSVERSELY TO SAID PATH AND ARRANGED TO FORM A PLURALITY OF ADJACENT WAVEGUIDE SECTIONS INTERCONNECTED TO DEFINE A SERPENTINE PATH FOR HIGH-FREQUENCY ENERGY, EACH OF SAID PARTITION MEMBERS HAVING AN APERTURE THEREIN TO FORM A CHANNEL FOR THE PASSAGE OF SAID OBJECT, A PLURALITY OF HIGH-FREQUENCY GENERATORS COUPLED TO INDIVIDUAL ONES OF THE HEATING UNITS OF SAID FIRST GROUP, AND MEANS FOR COUPLING THE HEATING UNITS OF SAID FIRST GROUP TO INDIVIDUAL ONES OF THE HEATING UNITS OF SAID SECOND GROUP THEREBY FORMING A HIGH-FREQUENCY ENERGY PROPAGATION PATH FOR EACH GENERATOR COMPRISING A HEATING UNIT OF EACH OF SAID FIRST AND SECOND GROUPS.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |