Patent US3621635A successfully refreshed from Google Patents.
US3621635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel wall
Assignee: CEMENT ENAMEL DEV Inc
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Filing: 1970-03-02
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Granted: 1971-11-23
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Expires: 1990-03-02
Abstract
Abstract A MONOLITHIC AGGREGATE TEXTURED TYPE WALL FORMED OF LARGE PANELS MADE OF THIN BASE SHEETS COVERED WITH A BONDED TEXTURED COATING, WITH THE PANELS ARRANGED EDGE TO EDGE UPON A SUPPORT SURFACE AND MOUNTED THEREON BY MEANS OF PANEL MOUNTING STRIPS HAVING DOWNWARDLY EXTENDING FLANGES INTERENGAGED WITH HORIZONTALLY ARRANGED J-SHAPED STRIPS FASTENED TO THE SUPPORT SURFACE, THE PANEL MOUNTING STRIPS BEING SECURED TO THE BASE SHEETS ONLY BY MECHANICAL FASTENERS BEFORE COATING THE SHEETS, WHEREIN THE FASTENERS ARE COVERED AND CONCEALED BY THE COATING.
Inventors
- 👤 Cornelis J De Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0832; E04F13/0833; E04F13/0851; E04F13/0803; E04F13/081; E04F13/083; E04F13/14; E04F13/144; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888; Y10T29/49908; Y10T29/49938; Y10T29/49943
Claims Analysis
Total Claims: 0
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References 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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |