US2585366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight concrete mixture
Assignee: GREAT LAKES CARBON Corp
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Filing: 1948-04-20
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Granted: 1952-02-12
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Expires: 1968-04-20
Abstract
No abstract record available.
Inventors
- 👤 Armand R Bollaert
- 👤 Ernest L Neu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:30
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A LIGHTWEIGHT CONCRETE OF IMPROVED CRUSHING STRENGTH CONSISTING ESSENTIALLY OF PORTLAND CEMENT, CELLULAR ARTIFICIALLY HEAT EXPANDED PERLITE AGGREGATE HAVING A BULK DENSITY OF 5-20 LBS. PER CU. FT., AND FROM 2-100% BY WEIGHT, BASED ON SAID CEMENT, OF A FINELY COMMINUTED SOLID CONSISTING ESSENTIALLY OF SILICA, THE VOLUMETRIC RATIO OF CEMENT TO AGGREGATE BEING WITHIN THE RANGE OF 1:5 TO 1:12.
Claim 2
Dependent Claim
61 words
A LIGHTWEIGHT CONCRETE OF IMPROVED CRUSHING STRENGTH CONSISTING ESSENTIALLY OF PORTLAND CEMENT, CELLULAR ARTIFICIALLY HEAT EXPANDED PERLITE AGGREGATE HAVING A BULK DENSITY OF 5-20 LBS. PER CU. FT., AND FROM 2-100% BY WEIGHT, BASED ON SAID CEMENT, OF A FINELY COMMINUTED SOLID CONSISTING ESSENTIALLY OF SILICA, THE VOLUMETRIC RATIO OF CEMENT TO AGGREGATE BEING WITHIN THE RANGE OF 1:5 TO 1:12.
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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |