Patent US3782985A successfully refreshed from Google Patents.
US3782985A
Expired / Lapsed
US
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Lightweight,high strength concrete and method for manufacturing the same
Assignee: Cadcom Inc
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Filing: 1971-11-26
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Granted: 1974-01-01
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Expires: 1991-11-26
Abstract
Abstract A LIGHTWEIGHT, HIGH STRENGTH CONCRETE IS FORMED BY MIXING WITH WATER, AN ADMIXTURE OF FINE AGGREGATE CONSISTING SOLVELY OF COAL FLY ASH CENOSPHERES AND DRY HYDRAULIC CEMENT, THEN SOLIDIFYING THE MIXTURE.
Inventors
- 👤 J Gebhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:04
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B18/08; C04B18/082; C04B28/00; C04B28/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 0
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |