US2517019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graded seal
Assignee: Corning Glass Works
•
Filing: 1948-09-24
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Granted: 1950-08-01
•
Expires: 1968-09-24
Abstract
No abstract record available.
Inventors
- 👤 Martin E Nordberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:13
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/044; C03B; C03B19/00; C03B19/06; C03B19/09; C03B23/00; C03B23/20; C03B23/207; C03C27/06; C03C27/10; Y; Y10; Y10S; Y10S33/00; Y10S33/11; Y10T; Y10T403/00; Y10T403/21; Y10T403/213; Y10T428/00; Y10T428/12; Y10T428/12458
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A GRADED SEAL COMPOSED OF A VITREOUS MIXTURE OF A LOW EXPANSION GLASS, A HIGHER EXPANSION GLASS, AND A CERAMIC MATERIAL MELTING AT A HIGHER TEMPERATURE THAN SAID GLASSES AND SELECTED FROM THE GROUP CONSISTING OF REFRACTORY OXIDES AND SILICATES, THE CERAMIC MATERIAL BEING SUBSTANTAILLY PRESENT AS UNFUSED PARTICLES AGGLOMERATED IN A MATRIX OF THE GLASSES, THE PROPORTIONS OF SUCH INGREDIENTS VARYING PROGRESSIVELY FROM A REGION OF LOW EXPANSION TO A REGION OF HIGH EXPANSION SUCH THAT THE DEFORMATION TEMPERATURE IS SUBSTANTAILLY UNIFORM THROUGHOUT.
Claim 2
Dependent Claim
84 words
A GRADED SEAL COMPOSED OF A VITREOUS MIXTURE OF A LOW EXPANSION GLASS, A HIGHER EXPANSION GLASS, AND A CERAMIC MATERIAL MELTING AT A HIGHER TEMPERATURE THAN SAID GLASSES AND SELECTED FROM THE GROUP CONSISTING OF REFRACTORY OXIDES AND SILICATES, THE CERAMIC MATERIAL BEING SUBSTANTAILLY PRESENT AS UNFUSED PARTICLES AGGLOMERATED IN A MATRIX OF THE GLASSES, THE PROPORTIONS OF SUCH INGREDIENTS VARYING PROGRESSIVELY FROM A REGION OF LOW EXPANSION TO A REGION OF HIGH EXPANSION SUCH THAT THE DEFORMATION TEMPERATURE IS SUBSTANTAILLY UNIFORM THROUGHOUT.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |