US3088834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally devitrifiable sealing glasses
Assignee: OI Glass Inc
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Filing: 1961-06-26
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Granted: 1963-05-07
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Perry P Pirooz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:47
CPC Classifications
C; C03; C03C; C03C27/00; C03C10/00; C03C10/0054; C03C8/00; C03C8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SEALING GLASS COMPOSITION THAT IS COMPATIBLE WITH MATERIAL HAVING EXPANSION COEFFICIENTS IN THE NEIGHBORHOOD OF 50X10-**7, HAS A LIQUIDUS TEMPERATURE ABOVE 2000$ F., A FIBER SOFTENING POINT ABOVE 600$ C, BUT BELOW 700$ C, IN THE VITREOUS STATE, IS CAPABLE OF BEING THERMALLY DEVITRIFED WITHIN A PERIOD OF 1 HOUR AT A TEMPERATURE IN THE RANGE FROM 675-750$C., AND CONSISTS ESSENTIALLY OF 16-18 WEIGHT PERCENT PBO, 12-15 WEIGHT PERCENT B2O3, 48-52 WEIGHT PERCENT ZNO AND 18-20 WEIGHT PERCENT SIO2.
Claim 2
Dependent Claim
80 words
A SEALING GLASS COMPOSITION THAT IS COMPATIBLE WITH MATERIAL HAVING EXPANSION COEFFICIENTS IN THE NEIGHBORHOOD OF 50X10-**7, HAS A LIQUIDUS TEMPERATURE ABOVE 2000$ F., A FIBER SOFTENING POINT ABOVE 600$ C, BUT BELOW 700$ C, IN THE VITREOUS STATE, IS CAPABLE OF BEING THERMALLY DEVITRIFED WITHIN A PERIOD OF 1 HOUR AT A TEMPERATURE IN THE RANGE FROM 675-750$C., AND CONSISTS ESSENTIALLY OF 16-18 WEIGHT PERCENT PBO, 12-15 WEIGHT PERCENT B2O3, 48-52 WEIGHT PERCENT ZNO AND 18-20 WEIGHT PERCENT SIO2.
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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |