Patent US1647815A successfully refreshed from Google Patents.
US3353940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming glass beads in a molten metal bath
Assignee: Selas Corp of America
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Filing: 1965-05-07
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Granted: 1967-11-21
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Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 Hans R Dolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:55
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/10; C03B19/1005; C03B19/1045; C03B19/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF FORMING GLASS BEADS WHICH COMPRISES INTRODUCING FINE GLASS PARTICLES INTO A BATH OF MOLTEN METAL AT A TEMPERATURE ABOVE THE SOFTENING TEMPERATURE OF THE GLASS WHEREBY THE PARTICLES WILL SOFTEN AND BE DRAWN BY SURFACE TENSION INTO SPHERES, MOVING THE SPHERES THROUGH THE METAL TO A ZONE HAVING A TEMPERATURE BELOW THE SOFTENING POINT OF THE GLASS WHEREBY THE SPHERES WILL SOLIDIFY, AND REMOVING THE SOLIDIFIED SPHERES FROM THE MOLTEN METAL.
Claim 2
Independent Claim
74 words
THE METHOD OF FORMING GLASS BEADS WHICH COMPRISES INTRODUCING FINE GLASS PARTICLES INTO A BATH OF MOLTEN METAL AT A TEMPERATURE ABOVE THE SOFTENING TEMPERATURE OF THE GLASS WHEREBY THE PARTICLES WILL SOFTEN AND BE DRAWN BY SURFACE TENSION INTO SPHERES, MOVING THE SPHERES THROUGH THE METAL TO A ZONE HAVING A TEMPERATURE BELOW THE SOFTENING POINT OF THE GLASS WHEREBY THE SPHERES WILL SOLIDIFY, AND REMOVING THE SOLIDIFIED SPHERES FROM THE MOLTEN METAL.
References Cited (Backward Citations)
US1671633A
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US1827931A
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US2543132A
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US3272893A
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US3288584A
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US3300289A
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US3207818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |