Patent US3608260A successfully refreshed from Google Patents.
US3608260A
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Acoustical panel assembly
Assignee: Eckel Ind Inc
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Filing: 1969-05-21
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Granted: 1971-09-28
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Expires: 1989-05-21
Abstract
Abstract ACOUSTICAL PANELS CARRY EXT*NSIONS OR JOINERS AT EACH OF TWO OPPOSITE SIDES WHICH ARE SPACED FROM THE MAIN BODY OF THE PANEL AND EXTEND ALTERNATELY DOWNWARD AND UPWARD, SAID SPACES PROVIDING RECEIVING RECESSES OPEN AT THE TOP AND BOTTOM RESPECTIVELY, THAT JOINERS OF THE NEAREST ADJACENT PANEL ENTER. AT CORNERS OF THE ASSEMBLY SEPARATE RIGHT ANGLES JOINERS EXTEND INTO RECESSES EACH PANEL PROVIDES THEREBY CONNECTING THE CORNER PANELS.
Inventors
- 👤 Alan Eckel
- 👤 Oliver C Eckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/541; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/292
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |