Form and drain tile
Abstract
Abstract THIS SPECIFICATION DISCLOSES A FORM INTENDED FOR USE IN THE CASTING OF CONCRETE OR CEMENT FOUNDATIONS AND WHICH HAS A DRAIN TILE INTEGRAL WITH AN ELEMENT THEREOF. THE FORM COMPRISES TWO FLAT WALL SECTIONS DETACHABLY CONNECTED. A DRAIN TILE IS INTEGRALLY FORMED ON THE LOWER WALL SECTION AND IS OF RECTANGULAR CROSS SECTION PRESENTING SPACED HORIZONTAL WALLS AND A SIDE WALL. THE LATTER IS FORMED WITH A PLURALITY OF SPACED DRAINAGE OPENINGS AND THE HORIZONTAL WALLS ARE FORMED AT SPACED INTERVALS WITH ALIGNED SLOT-LIKE APERTURES ADJACENT TO THE WALL SECTION FROM WHICH THEY EXTEND. STAKES ARE DRIVEN THROUGH THESE APERTURES AND NAILED TO THE UPPER WALL SECTION OF THE FORM. A MECHANICAL INTERLOCK BETWEEN THE LOWER WALL SECTION AND THE MATERIAL CAST IS PROVIDED AND MAY TAKE DIFFERENT FORMS.
Inventors
- 👤 Fred J Hreha
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |