Patent US3240661A successfully refreshed from Google Patents.
US3240661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High expansion glass, and seals
Assignee: OI Glass Inc
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Filing: 1962-05-17
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Granted: 1966-03-15
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Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:20
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/02; C03C8/00; C03C8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A GLASS SUITABLE FOR SEALING TO METALS, SAID GLASS HAVING AN EXPANSION CO-EFFICIENT (0-300*C.) IN THE RANGE FROM 115 TO 155X10**-7, AN ANNEALING POINT OF MORE THAN 325*C., A FIBER-SOFTENING POINT BELOW 670*C. AND A WEIGHT PERCENT COMPOSITION CONSISTING ESSENTIALLY OF 29-56 SIO2, 8-24 NA2O, 8-24 K2O, 0-4 LI2O, 3-28 TIO2, 0-6 AL2/3, 2.5-7 CAO, 1.5-6 MGO, THE TOTAL NA2O+K2O+LI2O BEING FROM 24 TO 36, THE TOTAL CAO+MGO BEING FROM 4 TO 11, THE TOTAL SIO2+AL2O3+TIO2 BEING 54-70%, AND THE TOTAL ALKALI METAL OXIDES +TIO2 BEING A MAXIMUM OF 61%.
Claim 2
Dependent Claim
90 words
A GLASS SUITABLE FOR SEALING TO METALS, SAID GLASS HAVING AN EXPANSION CO-EFFICIENT (0-300*C.) IN THE RANGE FROM 115 TO 155X10**-7, AN ANNEALING POINT OF MORE THAN 325*C., A FIBER-SOFTENING POINT BELOW 670*C. AND A WEIGHT PERCENT COMPOSITION CONSISTING ESSENTIALLY OF 29-56 SIO2, 8-24 NA2O, 8-24 K2O, 0-4 LI2O, 3-28 TIO2, 0-6 AL2/3, 2.5-7 CAO, 1.5-6 MGO, THE TOTAL NA2O+K2O+LI2O BEING FROM 24 TO 36, THE TOTAL CAO+MGO BEING FROM 4 TO 11, THE TOTAL SIO2+AL2O3+TIO2 BEING 54-70%, AND THE TOTAL ALKALI METAL OXIDES +TIO2 BEING A MAXIMUM OF 61%.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |