Patent US4559255A successfully refreshed from Google Patents.
Patent US3341341A successfully refreshed from Google Patents.
US3341341A
Expired / Lapsed
US
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Lightweight aggregate
Assignee: CONVERSION SYSTEMS OF PENNSYLVANIA Inc
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Filing: 1965-03-04
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Granted: 1967-09-12
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 Bolton L Corson
- 👤 Pfau Julius Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:51
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B18/08; C04B18/085; C04B18/02; C04B18/027; C04B20/00; C04B20/02; C04B20/04; C04B20/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S588/00; Y10S588/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A LIGHTWEIGHT AGGREGATE CONSISTING ESSENTIALLY OF DISCRETE, FINELY DIVIDED SILICENOUS PARTICLES BONDED TOGETHER AT THEIR POINTS OF CONTACT BY INTERFACIAL VITRIFICATION TO FORM A SUBSTANTIALLY NON-SPHERICAL SOLID BODY HAING INTERCOMNECTING PORES, AND AVERAGE TRANSVERSE DIMENSION OF FROM ABOUT 1/8" TO ABOUT 3/4" AND A LENGTH OF FROM ABOUT 1/4" TO ABOUT 1", FROM ABOUT 80 PERCENT TO ABOUT 100 PERCENT BY WEIGHT, OF SAID PARTICLES COMPRISING THE HIGHLY SILICEOUS, GLASSY SHPERICAL COMPONENT OF FLY ASH, AND FROM ABOUT 0 TO ABOUT 20 PERCENT COMPRISING A FINELY DIVIDED MATERIAL SELECTED FROM THE GROUP CONSISTING OF CLAY, SHALE, CINDERS AND SLAG, SIAD BODY BEING CAPABLE OF ABSORBING FROM ABOUT 15 TO ABOUT 30 PERCENT, BY WEIGHT, OF WATER, ON A DRY BASIS, IN 5 MINUTES, AND ONLY MINOR AMOUNTS OF WATER SUBSEQUENT THERETO.
Claim 2
Dependent Claim
30 words
A CONCRETE MIX CONSISTING ESSENTIALLY OF APPROXIMATELY 20 PERCENT BY WEIGHT OF PORTLAND CEMENT, APPROXIMATELY 45 PERCENT OF SAND, AND APPROXIMATELY 35 PERCENT OF THE LIGHTWEIGHT AGGREGATE OF CLAIM 7.
References Cited (Backward Citations)
US2987411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |