US3030215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow glass particles and method of producing the same
Assignee: Standard Oil Co
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Filing: 1959-12-02
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Granted: 1962-04-17
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Expires: 1979-12-02
Abstract
No abstract record available.
Inventors
- 👤 Veatch Franklin
- 👤 Harvey E Alford
- 👤 Richard D Croft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/02; C04B18/027; C03; C03B; C03B19/00; C03B19/10; C03B19/107; C03B19/1075; C03C; C03C11/00; C03C11/002; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/066; C08; C08J; C08J9/00; C08J9/32; Y; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/02; Y10S264/00; Y10S264/06; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A MASS OF HALLOW, DISCRETE SPHERES OF SYNTHETIC, FUSED, WATER-INSOLUBLE ALKALI METAL SILSCATE-BASED GLASS, SAI DHOLOW SPHERES HAVING SOILD WALLS OF THE SAME DENSITY THROUGHOUT, AND CLEAR, SMOOTH SURFACE, DIAMETERS OF FROM 5 TO 5000 MICRONS AND WALL THICKNESS OF FROM 0.5 TO 10% OF THEIR DIAMETERS, SAID HAVING A GAS DENSITY OF .1 TO 75.
Claim 2
Dependent Claim
56 words
A MASS OF HALLOW, DISCRETE SPHERES OF SYNTHETIC, FUSED, WATER-INSOLUBLE ALKALI METAL SILSCATE-BASED GLASS, SAI DHOLOW SPHERES HAVING SOILD WALLS OF THE SAME DENSITY THROUGHOUT, AND CLEAR, SMOOTH SURFACE, DIAMETERS OF FROM 5 TO 5000 MICRONS AND WALL THICKNESS OF FROM 0.5 TO 10% OF THEIR DIAMETERS, SAID HAVING A GAS DENSITY OF .1 TO 75.
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |