US3245770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous cylinder spinning of glass
Assignee: Corning Glass Works
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Filing: 1961-10-30
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Granted: 1966-04-12
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Stanley A Cortright
- 👤 Jr Thomas Howitt
- 👤 George C Shay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:37
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN IMPROVED METHOD OF CONTINUOUSLY FORMING UNIFORM CYLINDRICAL BODIES OF VITREOUS MATERIAL WHICH COMPRISES, CONTINUOUSLY FEEDING A STREAM OF MOLTEN LOW VISCOSITY VITREOUS MATERIAL DOWNWARDLY INTO ONE END OF A ROTATING CYLINDRICAL MOLD OF RELATIVELY HIGH-HEAT CONDUCTIVE MATERIAL, IMPINGING SUCH STREAM UPON AN INNER SURFACE WHICH IS OFFSET WITH RESPECT TO A VERTICAL PLANE PASSING THROUGH THE LONGITUDINAL AXIS OF THE ROTATING CYLINDRICAL MOLD, CENTRIFUGALLY ROTATING THE MOLD IN A DIRECTION COUNTERCURRENT TO THE DOWNWARD FLOW OF THE OFFSET IMPINGING STREAM TO DISTRIBUTE THE LOW VISCOSITY VITREOUS MATERIAL ABOUT THE INNER SURFACE OF THE ROTATING MOLD, REMOVING THE HEAT OF FUSION FROM THE VITREOUS MATERIAL BY UTILIZING THE HIGH HEAT CONDUCTIVITY PROPERTIES OF THE CYLINDRICAL MOLD, SOLIDIFYING THE VITREOUS MATERIAL WHILE IT IS CONTAINED WITHIN THE CYLINDRICAL MOLD, AND CONTINUOUSLY WITHDRAWING A RIGID VITREOUS CYLINDER FROM THE ROTATING MOLD AS THE CYLINDER IS CENTRIFUGALLY FORMED AND SOLIDIFIED THEREWITHIN.
Claim 2
Dependent Claim
148 words
AN IMPROVED METHOD OF CONTINUOUSLY FORMING UNIFORM CYLINDRICAL BODIES OF VITREOUS MATERIAL WHICH COMPRISES, CONTINUOUSLY FEEDING A STREAM OF MOLTEN LOW VISCOSITY VITREOUS MATERIAL DOWNWARDLY INTO ONE END OF A ROTATING CYLINDRICAL MOLD OF RELATIVELY HIGH-HEAT CONDUCTIVE MATERIAL, IMPINGING SUCH STREAM UPON AN INNER SURFACE WHICH IS OFFSET WITH RESPECT TO A VERTICAL PLANE PASSING THROUGH THE LONGITUDINAL AXIS OF THE ROTATING CYLINDRICAL MOLD, CENTRIFUGALLY ROTATING THE MOLD IN A DIRECTION COUNTERCURRENT TO THE DOWNWARD FLOW OF THE OFFSET IMPINGING STREAM TO DISTRIBUTE THE LOW VISCOSITY VITREOUS MATERIAL ABOUT THE INNER SURFACE OF THE ROTATING MOLD, REMOVING THE HEAT OF FUSION FROM THE VITREOUS MATERIAL BY UTILIZING THE HIGH HEAT CONDUCTIVITY PROPERTIES OF THE CYLINDRICAL MOLD, SOLIDIFYING THE VITREOUS MATERIAL WHILE IT IS CONTAINED WITHIN THE CYLINDRICAL MOLD, AND CONTINUOUSLY WITHDRAWING A RIGID VITREOUS CYLINDER FROM THE ROTATING MOLD AS THE CYLINDER IS CENTRIFUGALLY FORMED AND SOLIDIFIED THEREWITHIN.
References Cited (Backward Citations)
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US1607475A
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US1663093A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |