Patent US281704A successfully refreshed from Google Patents.
Patent US3258688A successfully refreshed from Google Patents.
US3258688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave thickness measuring apparatus
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
G; G01; G01B; G01B15/00; G01B15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
MICROWAVE INTERFEROMETER FOR MEASURING OBJECT THICKNESS COMPRISING PHASE COMPARING MEANS A HIGH FREQUENCY WAVE GENERATING SOURCE SENDING A PORTION OF ITS OUTPUTS TO SAID PHASE COMPARING MEANS, A FIRST ANTENNA MEANS SPACED FROM AND DIRECTED TOWARD ONE SIDE OF THE OBJECT, SECOND ANTENNA MEANS SPACED FROM AND DIRECTED TOWARDS THE SIDE OPPOSITE SAID ONE SIDE, MEANS TO DIRECT A PORTION OF THE OUTPUT OF SAID HIGH FREQUENCY WAVE GENERATING SOURCE TO SAID FIRST ANTENNA MEANS AND DIRECT THE REFLECTION FROM SAID OBJECT RECEIVED BY SAID FIRST ANTENNA MEANS TO SAID SECOND ANTENNA MEANS AND DIRECT THE REFLECTION RE-
Claim 2
Dependent Claim
98 words
MICROWAVE INTERFEROMETER FOR MEASURING OBJECT THICKNESS COMPRISING PHASE COMPARING MEANS A HIGH FREQUENCY WAVE GENERATING SOURCE SENDING A PORTION OF ITS OUTPUTS TO SAID PHASE COMPARING MEANS, A FIRST ANTENNA MEANS SPACED FROM AND DIRECTED TOWARD ONE SIDE OF THE OBJECT, SECOND ANTENNA MEANS SPACED FROM AND DIRECTED TOWARDS THE SIDE OPPOSITE SAID ONE SIDE, MEANS TO DIRECT A PORTION OF THE OUTPUT OF SAID HIGH FREQUENCY WAVE GENERATING SOURCE TO SAID FIRST ANTENNA MEANS AND DIRECT THE REFLECTION FROM SAID OBJECT RECEIVED BY SAID FIRST ANTENNA MEANS TO SAID SECOND ANTENNA MEANS AND DIRECT THE REFLECTION RE-
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |