Patent US2852352A successfully refreshed from Google Patents.
US2852352A
Expired / Lapsed
US
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Method of removing lead borate sealing glasses
Assignee: Corning Glass Works
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Filing: 1956-05-29
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Granted: 1958-09-16
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Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Rafael Landron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:16
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; C; C03; C03C; C03C15/00; C03C27/00; C03C27/06; C03C27/10; H01J9/00; H01J9/50; H01J2893/00; H01J2893/0072; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE METHOD OF REMOVING A LEAD BORATE SEALING GLASS FROM A SEALING SURFACE WHICH COMPRISES IMMERSING THE GLASS COATED SEALING SURFACE IN A BATH OF 0.5 N-2.5 N NITRIC ACID FOR A TIME SUFFICIENT FOR THE ACID TO REACT WITH AND DISSOLVE THE LEAD BORATE GLASS.
Claim 2
Independent Claim
46 words
THE METHOD OF REMOVING A LEAD BORATE SEALING GLASS FROM A SEALING SURFACE WHICH COMPRISES IMMERSING THE GLASS COATED SEALING SURFACE IN A BATH OF 0.5 N-2.5 N NITRIC ACID FOR A TIME SUFFICIENT FOR THE ACID TO REACT WITH AND DISSOLVE THE LEAD BORATE GLASS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |