Patent US2511242A successfully refreshed from Google Patents.
Patent US3567171A successfully refreshed from Google Patents.
US3567171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key form
Assignee: Individual
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Filing: 1968-07-11
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Granted: 1971-03-02
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Expires: 1988-07-11
Abstract
Abstract A key form for concrete made of concrete flexible plastic composition and employed to form a keyway or depression in poured concrete. Removal of the form is facilitated by means of handles flush in the form. A method for forming a keyway includes the nailing of the key form to an inward surface of a concrete form. After removal of the concrete form and subsequent removal of the key form, a keyway is revealed.
Inventors
- 👤 Robert L Slominski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:58
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/0064; B28B7/0079; B28B23/00; B28B23/0056; B28B7/06; B28B7/28; E; E04; E04G; E04G15/00; E04G15/06; E04G15/063; E04G15/068
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A keyway form adapted for attachment to a concrete form, the keyway form comprising an elongated flexible block having front and rear sides and a tapered transverse cross section, at least one aperture transversely disposed between said front and said rear sides, anchor means retained in each said aperture, at least one recess formed in said front side, handle means mounted on each said anchor means, said handle means being disposed in said recess and adapted for outward pivotal displacement thereby permitting said handle means to be grasped.
Claim 2
Dependent Claim
88 words
A keyway form adapted for attachment to a concrete form, the keyway form comprising an elongated flexible block having front and rear sides and a tapered transverse cross section, at least one aperture transversely disposed between said front and said rear sides, anchor means retained in each said aperture, at least one recess formed in said front side, handle means mounted on each said anchor means, said handle means being disposed in said recess and adapted for outward pivotal displacement thereby permitting said handle means to be grasped.
Claim 3
Dependent Claim
64 words
The structure set forth in claim 1 together with fastener means disposed in said flexible block and extending outwardly from said front side, said fastener means being adapted for attachment to a concrete form so that said concrete form is retained in juxtaposition with the front side of said keyway form, and further wherein said anchor and handle means are separable from said aperture.
Claim 4
Dependent Claim
147 words
A form assembly comprising a plurality of keyway forms retained in aligned spaced overlying relation and adapted for attachment to a concrete form, each said form having front and rear sides with a tapered transverse cross section at least one aperture transversely disposed between the front and rear sides of each keyway form, anchor means retained in each said aperture, at least one recess formed in said front side, handle means mounted on each said anchor means and disposed in said recess, said handle means being adapted for outward pivotal displacement thereby permitting the same to be grasped, water stop means disposed between confronting form surfaces in juxtaposition thereto so that one edge of said water stop means is retained in coplanar relation with the front sides of the overlying and underlying keyway forms, and means for retaining said forms and said water stop means in juxtaposition.
Claim 5
Dependent Claim
147 words
A form assembly comprising a plurality of keyway forms retained in aligned spaced overlying relation and adapted for attachment to a concrete form, each said form having front and rear sides with a tapered transverse cross section at least one aperture transversely disposed between the front and rear sides of each keyway form, anchor means retained in each said aperture, at least one recess formed in said front side, handle means mounted on each said anchor means and disposed in said recess, said handle means being adapted for outward pivotal displacement thereby permitting the same to be grasped, water stop means disposed between confronting form surfaces in juxtaposition thereto so that one edge of said water stop means is retained in coplanar relation with the front sides of the overlying and underlying keyway forms, and means for retaining said forms and said water stop means in juxtaposition.
Claim 6
Dependent Claim
18 words
The assembly set forth in claim 3 wherein said confronting form surfaces are positionable in parallel spaced 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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |