Patent US3251618A successfully refreshed from Google Patents.
US3251618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric window structure
Assignee: Varian Medical Systems Inc
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Filing: 1964-07-07
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Granted: 1966-05-17
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Expires: 1984-07-07
Abstract
No abstract record available.
Inventors
- 👤 Gerhard B Kuehne
- 👤 Werner P Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/08; Y; Y10; Y10T; Y10T403/00; Y10T403/21
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A HERMETIC SEAL STRUCTURE COMPRISING A METAL UNIT AND A DIELECTRIC UNIT, SAID METAL UNIT HAVING TWO AXIALLY SPACED FLAT ANNULAR SURFACES, SAID DIELECTRIC UNIT HAVING AN ANNULAR PORTION HAVING OPPOSITE FACES THEREOF SLIDABLY CONFINED BETWEEN SAID FLAT SURFACES, AND A FLEXIBLE METAL RING BONDED TO SAID METAL AND DIELECTRIC UNITS.
References Cited (Backward Citations)
GB583242A
Cited
US2584653A
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US2744592A
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US2773289A
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US2708250A
Cited
US3115957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |