Patent US776616A successfully refreshed from Google Patents.
US3374076A
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Method for producing hermetic glass to metal seals
Assignee: Corning Glass Works
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Filing: 1964-09-28
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Granted: 1968-03-19
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Terry P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:58
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C27/00; C03C27/02; C03C3/11; H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/157; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121; Y10T428/00; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD FOR PRODUCING A HERMETIC GLASS TO METAL SEAL WHICH MEETS EXACTING REQUIREMENTS OF DIMENSION AND CONFIGUARATION CONSISTING ESSENTIALLY OF THE STEPS OF: GRINDING A GLASS TO AN ULTRAFINE PARTICLE SIZE SUCH THAT ABOUT 99% WILL PASS THROUGH A 200 MESH SCREEN AND AT LEAST 90% THROUGH A 325 MESH SCREEN, SAID GLASS HAVING SUBSTANTIALLY THE SAME THERMAL EXPANSION CHARACTERISTICS AS THE METAL TO WHICH IT WILL BE SEALED, MIXING THE ULTRAFINE GLASS WITH A BINDER TO FORM LARGE AGGREGATES, PRESSING THE AGGREGATES AND THE METAL TO FORM A COMPACT OF THE DESIRED SHAPE AND HEATING SAID COMPACT TO A TEMPERATURE IN EXCESS OF THE SOFTENING POINT OF THE GLASS FOR A TIME SUFFICIENT TO FORM A HERMETIC SEAL.
Claim 2
Independent Claim
120 words
A METHOD FOR PRODUCING A HERMETIC GLASS TO METAL SEAL WHICH MEETS EXACTING REQUIREMENTS OF DIMENSION AND CONFIGUARATION CONSISTING ESSENTIALLY OF THE STEPS OF: GRINDING A GLASS TO AN ULTRAFINE PARTICLE SIZE SUCH THAT ABOUT 99% WILL PASS THROUGH A 200 MESH SCREEN AND AT LEAST 90% THROUGH A 325 MESH SCREEN, SAID GLASS HAVING SUBSTANTIALLY THE SAME THERMAL EXPANSION CHARACTERISTICS AS THE METAL TO WHICH IT WILL BE SEALED, MIXING THE ULTRAFINE GLASS WITH A BINDER TO FORM LARGE AGGREGATES, PRESSING THE AGGREGATES AND THE METAL TO FORM A COMPACT OF THE DESIRED SHAPE AND HEATING SAID COMPACT TO A TEMPERATURE IN EXCESS OF THE SOFTENING POINT OF THE GLASS FOR A TIME SUFFICIENT TO FORM A HERMETIC SEAL.
References Cited (Backward Citations)
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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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |