Patent US3903929A successfully refreshed from Google Patents.
US3073975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal unit
Assignee: RCA Corp
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Filing: 1958-12-23
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Granted: 1963-01-15
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Expires: 1978-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert R Bigler
- 👤 Edward M Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:28
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0514; H03H9/10; H03H9/1007; H03H9/1014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A HERMETICALLY SEALED QUARTZ CRYSTAL UNIT CHARACTERIZED BY THE COMPLETE ABSENCE OF FLEXIBLE LEADS IN THE INTERIOR THEREOF, COMPRISING A HOLDER HAVING FLAT BASE PART AND A COOPERATING HOLLOW PART SEALED THERETO, SAID PARTS BEING MADE OF INSULATION MATERIAL, A METALLIC DEPOSIT ON THE ADJOINING SURFACES OF BOTH PARTS EXTENDING AROUND THE ENTIRE HOLDER, SAID PARTS BEING FUSED TOGETHER AT SAID METALLIC DEPOSIT, METAL COATINGS ON INTERIOR SURFACES OF SAID HOLDER ON OPPOSITE SIDES OF THE QUARTZ PLATE CONSTITUTING ELECTRODES FOR THE QUARTZ PLATE, METALIZED SEALED APERTURES IN SAID HOLDER COMMUNICATING WITH SAID ELECTODES, METAL COATINGS ON THE EXTERIOR OF SAID HOLDER CONNECTED TO SAID METALIZED APERTURES, SAID LAST-MENTIONED METAL COATINGS BEING SPACED FROM EACH OTHER BY INSULATION OF SAID HOLDER PARTS.
Claim 2
Dependent Claim
122 words
A HERMETICALLY SEALED QUARTZ CRYSTAL UNIT CHARACTERIZED BY THE COMPLETE ABSENCE OF FLEXIBLE LEADS IN THE INTERIOR THEREOF, COMPRISING A HOLDER HAVING FLAT BASE PART AND A COOPERATING HOLLOW PART SEALED THERETO, SAID PARTS BEING MADE OF INSULATION MATERIAL, A METALLIC DEPOSIT ON THE ADJOINING SURFACES OF BOTH PARTS EXTENDING AROUND THE ENTIRE HOLDER, SAID PARTS BEING FUSED TOGETHER AT SAID METALLIC DEPOSIT, METAL COATINGS ON INTERIOR SURFACES OF SAID HOLDER ON OPPOSITE SIDES OF THE QUARTZ PLATE CONSTITUTING ELECTRODES FOR THE QUARTZ PLATE, METALIZED SEALED APERTURES IN SAID HOLDER COMMUNICATING WITH SAID ELECTODES, METAL COATINGS ON THE EXTERIOR OF SAID HOLDER CONNECTED TO SAID METALIZED APERTURES, SAID LAST-MENTIONED METAL COATINGS BEING SPACED FROM EACH OTHER BY INSULATION OF SAID HOLDER PARTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |