US3664630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete wall form liner
Assignee: General Electric Co
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Filing: 1970-06-19
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Granted: 1972-05-23
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Expires: 1990-06-19
Abstract
Abstract A CONCRETE WALL FORM LINER FOR PRODUCING A RIBBED CONCRETE WALL SIDE SURFACE, FORMED OF SHEET PLASTIC MATERIAL, HAVING GENERALLY SINUOUS CONTOUR, AND PROVIDED WITH COMPLEMENTARY OVERLAPPING AND INTERLOCKING END EDGE REGIONS BY MEANS OF WHICH SIDE-TO-SIDE CONTINUITY MAY JACENT LINERS MAY BE ATTAINED. END-TO-END CONTINUITY MAY BE EFFECTED BY THE USE OF SPECIAL FILLER BLOCKS WHICH ALIGN THE SECTIONS LONGITUDINALLY.
Inventors
- 👤 James D Maynen
- 👤 George F Bowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:12
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/36; E; E04; E04G; E04G9/00; E04G9/10; E04G9/02; E04G2009/028
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |