Patent EP0385916A2 successfully refreshed from Google Patents.
US3756756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure mold for removing liquid from material being cast
Assignee: United States Department of the Navy
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Filing: 1972-05-25
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Granted: 1973-09-04
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Expires: 1992-05-25
Abstract
Abstract Grooved plates and end grain redwood boards are combined to form a filtering means used in the preparation of high strength cementitious material.
Inventors
- 👤 J Wilson
- 👤 C Austin
- 👤 W Sayler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:11
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/40; B28B7/44; B28B7/46; Y; Y10; Y10S; Y10S425/00; Y10S425/119; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
Apparatus for removing excess water and air from freshly mixed cementitious material, said apparatus comprising: a mold having a plurality of openings through which water and air can escape; a plate covering the interior of each said opening, said plate being grooved and sized so that water and air from the interior of said mold can reach said opening around it; an end grain redwood board covering the interior face of each said plate; and means for applying pressure to cementitious material within said mold.
Claim 2
Dependent Claim
85 words
Apparatus for removing excess water and air from freshly mixed cementitious material, said apparatus comprising: a mold having a plurality of openings through which water and air can escape; a plate covering the interior of each said opening, said plate being grooved and sized so that water and air from the interior of said mold can reach said opening around it; an end grain redwood board covering the interior face of each said plate; and means for applying pressure to cementitious material within said mold.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |