US2724892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming metal to ceramic seal
Assignee: Westinghouse Electric Corp
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Filing: 1950-11-14
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Granted: 1955-11-29
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Expires: 1970-11-14
Abstract
No abstract record available.
Inventors
- 👤 William J Knochel
- 👤 Eber Mortimer
- 👤 Hermann J Ehringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:36
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/121; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/62; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/76; C04B2237/765; C04B2237/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
THE METHOD OF COATING A CERAMIC DISC FOR SEALING TO A METALLIC SURFACE COMPRISING HEATING SAID DISC IN AIR TO A TEMPERATURE OF APPROXIMATELY 1000*C. FOR ONE HALF HOUR TO BURN OFF UNDESIRABLE IMPURITIES, MIXING A SUSPENSION OF A PLURALITY OF HYDRIDES OF METALS OF THE GROUP CONSISTING OF ZICRONIUM, TITANIUM, TANTALUM, COLUMBIUM, VANADIUM, AND THORIUM IN A MIXTURE OF A VEHICLE AND BINDER, PAINTING THE SURFACE AREA TO BE JOINED OF SAID DISC WITH SAID SUSPENSION, ASSEMBLING SAID PAINTED CERAMIC DISC WITH A PURE SILVER SOLDER AND HEATING SAID DISC AND SOLDER IN A PROTECTIVE ATMOSPHERE THEREBY REDUCING THE METAL HYDRIDES ON THE SURFACE AREA TO BE COATED TO THE METALS, MELTING THE SOLDER TO FORM ON SAID SURFACE AREA A DURABLE INACTIVE ALLOY BEING RESISTANT TO THE FORMATION OF SOLID SAID INACTIVE ALLOY BEING RESISTANT TO THE FORMATION OF SOLID SUSPENSIONS WITH DELETERIOUS GASES AT BRAZING TEMPERATURES AND HAVING A HARDNESS RESISTANT TO CHIPPING AND SCRAPING DURING HANDLING.
Claim 2
Independent Claim
160 words
THE METHOD OF COATING A CERAMIC DISC FOR SEALING TO A METALLIC SURFACE COMPRISING HEATING SAID DISC IN AIR TO A TEMPERATURE OF APPROXIMATELY 1000*C. FOR ONE HALF HOUR TO BURN OFF UNDESIRABLE IMPURITIES, MIXING A SUSPENSION OF A PLURALITY OF HYDRIDES OF METALS OF THE GROUP CONSISTING OF ZICRONIUM, TITANIUM, TANTALUM, COLUMBIUM, VANADIUM, AND THORIUM IN A MIXTURE OF A VEHICLE AND BINDER, PAINTING THE SURFACE AREA TO BE JOINED OF SAID DISC WITH SAID SUSPENSION, ASSEMBLING SAID PAINTED CERAMIC DISC WITH A PURE SILVER SOLDER AND HEATING SAID DISC AND SOLDER IN A PROTECTIVE ATMOSPHERE THEREBY REDUCING THE METAL HYDRIDES ON THE SURFACE AREA TO BE COATED TO THE METALS, MELTING THE SOLDER TO FORM ON SAID SURFACE AREA A DURABLE INACTIVE ALLOY BEING RESISTANT TO THE FORMATION OF SOLID SAID INACTIVE ALLOY BEING RESISTANT TO THE FORMATION OF SOLID SUSPENSIONS WITH DELETERIOUS GASES AT BRAZING TEMPERATURES AND HAVING A HARDNESS RESISTANT TO CHIPPING AND SCRAPING DURING HANDLING.
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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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |