US2933423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preoxidation of stainless steel for glass-to-metal sealing
Assignee: Kimble Glass Inc
•
Filing: 1958-03-03
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Granted: 1960-04-19
•
Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 George B Brookover
- 👤 Elgin M Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:04
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/10; C23C8/16; C23C8/18; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046; C23C8/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE METHOD OF PREXIDIZING THE SURFACE OF CHROMEIRON ALLOY PARTS PRIOR TO SEALING SAID PARTS TO GLASS, SAID METHOD COMPRISING THE STEPS OF EXPOSING THE PARTS TO A STREAM OF WET HYDROGEN FOR APPROXIMATELY 6 TO 8 MINUTES AT A TEMPERATURE BELOW 200*F. TO FLUSH AWAY ENTRAINED AIR AT THE SURFACE OF SAID PARTS, SUBJECTING SAID PARTS TO A STREAM OF WET HYDROGEN FOR APPROXIMATELY 12 TO 18 MINUTES AT A TEMPERATURE RANGING FROM ABOUT 2050* TO 2150*F. THE GASEOUS STREAM COMPRISING ABOUT 2 TO 25% OF THE HYDROGEN SATURATED WITH WATER VAPOR AT A TEMPERATURE FROM ABOUT 18 TO 26*C., FURTHER SUBJECTING SAID PARTS TO A STREAM OF WET HYDROGEN CONTAINING AN INCREASED AMOUNT OF WATER VAPOR FOR APPROXIMATELY 30 TO 40 MINUTES AT THE AFORESAID TEMPERATURE RANGING FROM
Claim 2
Independent Claim
130 words
THE METHOD OF PREXIDIZING THE SURFACE OF CHROMEIRON ALLOY PARTS PRIOR TO SEALING SAID PARTS TO GLASS, SAID METHOD COMPRISING THE STEPS OF EXPOSING THE PARTS TO A STREAM OF WET HYDROGEN FOR APPROXIMATELY 6 TO 8 MINUTES AT A TEMPERATURE BELOW 200*F. TO FLUSH AWAY ENTRAINED AIR AT THE SURFACE OF SAID PARTS, SUBJECTING SAID PARTS TO A STREAM OF WET HYDROGEN FOR APPROXIMATELY 12 TO 18 MINUTES AT A TEMPERATURE RANGING FROM ABOUT 2050* TO 2150*F. THE GASEOUS STREAM COMPRISING ABOUT 2 TO 25% OF THE HYDROGEN SATURATED WITH WATER VAPOR AT A TEMPERATURE FROM ABOUT 18 TO 26*C., FURTHER SUBJECTING SAID PARTS TO A STREAM OF WET HYDROGEN CONTAINING AN INCREASED AMOUNT OF WATER VAPOR FOR APPROXIMATELY 30 TO 40 MINUTES AT THE AFORESAID TEMPERATURE RANGING FROM
References Cited (Backward Citations)
US2442223A
Cited
US2502855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |