US3007804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic material
Assignee: Bausch and Lomb Inc
•
Filing: 1958-12-18
•
Granted: 1961-11-07
•
Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Norbert J Kreidl
- 👤 Robert A Weidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:11
CPC Classifications
C; C03; C03C; C03C10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF MANUFACTURING A CERAMIC CRYSTALLINE MATERIAL WHICH COMPRISES THE STEPS OF HEARING A GLASS FORMING COMPOSITION WHICH WHEN LIQUID WILL PROVIDE A MELT CONTAINING BETWEEN ABOUT 65 TO 100 MOLE PERCENT OF CAO.ALO1.5, CONTINUING THE HEATING STEP AT A TEMPERATURE ABOVE THE MELTING POINT OF THE COMPOSITION TO FORM A LIQUID MELT, THEREAFTER COOLING THE MELT TO A TEMPERATURE BELOW THE LIQUIDUS TEMPERATURE TO FORM AMORPHOUS GLASS AND SUBSEQUENTLY REHEATING THE AMORPHOUS GLASS AT A TEMPERATURE ABOVE THE ANNEALING TEMPERATURE OF SUCH GLASS AND HOLDING THE GLASS AT SUCH ELEVATED TEMPERATURE UNTIL A CRYSTALLINE CERAMIC MATERIAL IS FORMED.
Claim 2
Independent Claim
100 words
THE METHOD OF MANUFACTURING A CERAMIC CRYSTALLINE MATERIAL WHICH COMPRISES THE STEPS OF HEARING A GLASS FORMING COMPOSITION WHICH WHEN LIQUID WILL PROVIDE A MELT CONTAINING BETWEEN ABOUT 65 TO 100 MOLE PERCENT OF CAO.ALO1.5, CONTINUING THE HEATING STEP AT A TEMPERATURE ABOVE THE MELTING POINT OF THE COMPOSITION TO FORM A LIQUID MELT, THEREAFTER COOLING THE MELT TO A TEMPERATURE BELOW THE LIQUIDUS TEMPERATURE TO FORM AMORPHOUS GLASS AND SUBSEQUENTLY REHEATING THE AMORPHOUS GLASS AT A TEMPERATURE ABOVE THE ANNEALING TEMPERATURE OF SUCH GLASS AND HOLDING THE GLASS AT SUCH ELEVATED TEMPERATURE UNTIL A CRYSTALLINE CERAMIC MATERIAL IS FORMED.
References Cited (Backward Citations)
US2920971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |