Patent US3552076A successfully refreshed from Google Patents.
US3552076A
Expired / Lapsed
US
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Concrete form
Assignee: 526806 ONTARIO Ltd
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Filing: 1968-10-24
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Granted: 1971-01-05
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Expires: 1988-10-24
Abstract
Abstract A SELF-SUPPORTING CONCRETE FORM OF RIGID, LOW-DENSITY FOAMED PLASTIC ADAPTED TO BE LEFT IN PLACE TO PROVIDE INSULATION FOR A WALL FORMED OF A PLURALITY OF SUCH FORMS WHCH HAVE BEEN FILLED WITH CONCRETE. THE FORMS HAVE VERTICAL CAVITIES EXTENDING THERETHROUGH AND LONGITUDINALLY EXTENDING CHANNELS SO AS TO PROVIDE VERTICAL COLUMNS OF CONCRETE INTERCONNECTED BY INTEGRAL HORIZONTAL CONCRETE BEAMS.
Inventors
- 👤 Werner K H Gregori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:24
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/42; E04B2/54; E04B2/84; E04B2/86; E04B2/8611; E04B2/8617; E04B2002/0202; E04B2002/0204; E04B2002/0206; E04B2002/867
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |