Patent US3680823A successfully refreshed from Google Patents.
US3680823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for concrete flat work
Assignee: Individual
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Filing: 1969-04-14
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Granted: 1972-08-01
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Expires: 1989-04-14
Abstract
Abstract A concrete flat work form system for facilitating the placement of floors, sidewalks, patios and the like in which the form element is bent or rolled from sheet material to an angle shape and further providing spaced holes for the reception of cooperatively shaped and drilled support stakes. The sheet material is cut adjacent the stake holes providing a tab at the form face for mating engagement of a similarly derived form element disposed in stacked arrangement above the first form element. The tab is positioned for non-interference with concrete finishing tools.
Inventors
- 👤 Earl H Lougheed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:48
CPC Classifications
E; E04; E04G; E04G13/00; E01; E01C; E01C19/00; E01C19/50; E01C19/502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A flat work form system for use in connection with the placement and finishing of concrete surfaces at bare ground work sites comprising a form element having upright and top flange components disposed in angular position one with the other, said top flange providing a plurality of spaced openings therein in position against said upright flange, and a plurality of support stakes for engagement in the ground that are of cross-sectional shape corresponding to the opening in said top flange for disposition therethrough and for contact with a rear face of said upright flange, said upright flange terminating at a lower edge not wider than the thickness thereof, whereby penetrating engagement of said upright flange with the supporting ground is facilitated and wherein a plurality of said form elements as set forth herein are used in stacked arrangement one above the other, and further comprising tabs on a first or lower fOrm element in position adjacent the top flange openings thereof adapted to support the upright flange of the upper form element with the upright flanges of upper and lower form elements being in aligned relation.
Claim 2
Dependent Claim
186 words
A flat work form system for use in connection with the placement and finishing of concrete surfaces at bare ground work sites comprising a form element having upright and top flange components disposed in angular position one with the other, said top flange providing a plurality of spaced openings therein in position against said upright flange, and a plurality of support stakes for engagement in the ground that are of cross-sectional shape corresponding to the opening in said top flange for disposition therethrough and for contact with a rear face of said upright flange, said upright flange terminating at a lower edge not wider than the thickness thereof, whereby penetrating engagement of said upright flange with the supporting ground is facilitated and wherein a plurality of said form elements as set forth herein are used in stacked arrangement one above the other, and further comprising tabs on a first or lower fOrm element in position adjacent the top flange openings thereof adapted to support the upright flange of the upper form element with the upright flanges of upper and lower form elements being in aligned relation.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |