US3830776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate fly ash beads
Assignee: Consolidation Coal Co
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Filing: 1973-07-02
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Granted: 1974-08-20
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Expires: 1993-07-02
Abstract
Abstract FLY ASH BEADS HAVING A SPECIFIC GRAVITY OF LESS THAN ABOUT 1.25 AS SEPARATED INTO FRACTIONS HAVING PARTICULAR PROPERTIES AS PARTICULATE FILLER AND SUBSTRATE.
Inventors
- 👤 R Flood
- 👤 J Carlson
- 👤 W Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:47
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B20/00; C04B20/10; C04B20/1055; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C09; C09C; C09C1/00; C01; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/60; C01P2006/90; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |