US3242303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave heating apparatus
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1963-06-06
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Granted: 1966-03-22
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Expires: 1983-06-06
Abstract
No abstract record available.
Inventors
- 👤 Crapuchettes Paul Wythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:31
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
MICROWAVE HEATING APPARATUS COMPRISING, A HEATING CAVITY, MEANS FOR SUPPLYING ELECTROMAGNETIC WAVE ENERGY OF A PREDETERMINED WAVE LENGTH AND FREQUENCY TO SAID CAVITY, SAID CAVITY HAVING AN OPENING THEREIN FOR ACCESS TO THE INTERIOR THEREOF, A CONDUCTIVE SURFACE EXTENDING AWAY FROM THE EXTERIOR SIDE OF SAID OPENING, A MOVABLY MOUNTED DOOR FOR CLOSING SAID OPENING WHENEVER SAID HEATING APPARATUS IS TO BE USED, THE BOUNDARY OF SAID DOOR BEING POSITIONED IN SPACED RELATION WITH AN AREA OF SAID CONDUCTIVE SURFACE WHEN SAID DOOR IS IN ITS CLOSED POSITION, THE WIDTH OF SAID AREA BEING A FIRST PREDETERMINED DIMENSION WITH RESPECT TO SAID PREDETERMINED WAVE LENGTH, A GROOVE FORMED IN ONE OF SAID AREA AND SAID BOUNDARY, THE DEPTH OF SAID GROOVE BEING A SECOND PREDETERMINED DIMENSION WITH RESPECT TO SAID PREDETERMINED WAVE LENGTH, A SOLID DIELECTRIC MEMBER ATTACHED TO SAID ONE OF SAID AREA AND SAID BOUNDARY, THEREBY COVERING THE OPENING OF SAID GROOVE AND OCCUPYING THE SPACE BETWEEN SAID AREA AND SAID BOUNDARY WHEN SAID DOOR IS IN ITS CLOSED POSITION, SAID AREA, BOUNDARY AND DIELECTRIC MEMBER FORMING A FIRST PARALLEL STRIP TRANSMISSION HAVING A LENGTH EQUAL TO SAID FIRST PREDETERMINED DIMENSION, SAID GROOVE FORMING A SECOND PARALLEL STRIP TRANSMISSION LINE HAVING A LENGTH EQUAL TO SAID SECOND PREDETERMINED DIMENSION
Claim 2
Dependent Claim
211 words
MICROWAVE HEATING APPARATUS COMPRISING, A HEATING CAVITY, MEANS FOR SUPPLYING ELECTROMAGNETIC WAVE ENERGY OF A PREDETERMINED WAVE LENGTH AND FREQUENCY TO SAID CAVITY, SAID CAVITY HAVING AN OPENING THEREIN FOR ACCESS TO THE INTERIOR THEREOF, A CONDUCTIVE SURFACE EXTENDING AWAY FROM THE EXTERIOR SIDE OF SAID OPENING, A MOVABLY MOUNTED DOOR FOR CLOSING SAID OPENING WHENEVER SAID HEATING APPARATUS IS TO BE USED, THE BOUNDARY OF SAID DOOR BEING POSITIONED IN SPACED RELATION WITH AN AREA OF SAID CONDUCTIVE SURFACE WHEN SAID DOOR IS IN ITS CLOSED POSITION, THE WIDTH OF SAID AREA BEING A FIRST PREDETERMINED DIMENSION WITH RESPECT TO SAID PREDETERMINED WAVE LENGTH, A GROOVE FORMED IN ONE OF SAID AREA AND SAID BOUNDARY, THE DEPTH OF SAID GROOVE BEING A SECOND PREDETERMINED DIMENSION WITH RESPECT TO SAID PREDETERMINED WAVE LENGTH, A SOLID DIELECTRIC MEMBER ATTACHED TO SAID ONE OF SAID AREA AND SAID BOUNDARY, THEREBY COVERING THE OPENING OF SAID GROOVE AND OCCUPYING THE SPACE BETWEEN SAID AREA AND SAID BOUNDARY WHEN SAID DOOR IS IN ITS CLOSED POSITION, SAID AREA, BOUNDARY AND DIELECTRIC MEMBER FORMING A FIRST PARALLEL STRIP TRANSMISSION HAVING A LENGTH EQUAL TO SAID FIRST PREDETERMINED DIMENSION, SAID GROOVE FORMING A SECOND PARALLEL STRIP TRANSMISSION LINE HAVING A LENGTH EQUAL TO SAID SECOND PREDETERMINED DIMENSION
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |