US2848801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ceramic metal seal
Assignee: Individual
•
Filing: 1954-01-04
•
Granted: 1958-08-26
•
Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Eber Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:45
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/125; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/346; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/64; C04B2237/76; C04B2237/765; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD OF FORMING A VACUUM-TIGHT SEAL BETWEEN A ZINCRON-PORCELAIN DISC AND A KOVAR RING DISPOSED CIRCUMFERENTIALLY ABOUT THE DISC, SAID METHOD INCLUDING DISPOSING A LAYER OF SOLDERING MATERIAL CLOSELY ABOUT THE PERIPHERY OF SAID DISC, FITTING SIAD RING CLOSELY ABOUT SAID SOLDER, FITTING RESILIENT METAL CLAMP ABOUT THE EXTERIOR SURFACE OF SAID RING FOR YIELDING PRESSING SAID RING INTO INTIMATE CONTACT WITH SAID SOLDER AND HEATING SAID ASSEMBLIES SUFFICIENTLY TO MELT SAID SOLDER FOR FORMING SAID VACUUM-TIGHT SEAL, SAID CLAMP BEING FORMED OF A MATERIAL HAVING A COEFFICIENT OF THERMAL EXPANSION SUBSTANTIALLY THE SAME AS THAT OF SAID DISC BUT LESS THAN THAT OF SAID RING, SAID CLAMP FURTHER HAVING A COMPRESSIVE STRENGTH DURING SAID HEATING SUFFICIENTLY GREATER THAN THE RIGID STRENGTH OF SAID KOVAR RING WHEREBY SAID CLAMP EFFECTIVELY RESTRAINS HEAT EXPANSION OF SAID METAL RING AWAY FROM SAID DISC DURING SAID HEATING.
Claim 2
Independent Claim
145 words
A METHOD OF FORMING A VACUUM-TIGHT SEAL BETWEEN A ZINCRON-PORCELAIN DISC AND A KOVAR RING DISPOSED CIRCUMFERENTIALLY ABOUT THE DISC, SAID METHOD INCLUDING DISPOSING A LAYER OF SOLDERING MATERIAL CLOSELY ABOUT THE PERIPHERY OF SAID DISC, FITTING SIAD RING CLOSELY ABOUT SAID SOLDER, FITTING RESILIENT METAL CLAMP ABOUT THE EXTERIOR SURFACE OF SAID RING FOR YIELDING PRESSING SAID RING INTO INTIMATE CONTACT WITH SAID SOLDER AND HEATING SAID ASSEMBLIES SUFFICIENTLY TO MELT SAID SOLDER FOR FORMING SAID VACUUM-TIGHT SEAL, SAID CLAMP BEING FORMED OF A MATERIAL HAVING A COEFFICIENT OF THERMAL EXPANSION SUBSTANTIALLY THE SAME AS THAT OF SAID DISC BUT LESS THAN THAT OF SAID RING, SAID CLAMP FURTHER HAVING A COMPRESSIVE STRENGTH DURING SAID HEATING SUFFICIENTLY GREATER THAN THE RIGID STRENGTH OF SAID KOVAR RING WHEREBY SAID CLAMP EFFECTIVELY RESTRAINS HEAT EXPANSION OF SAID METAL RING AWAY FROM SAID DISC DURING SAID HEATING.
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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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |