Patent US3119475A successfully refreshed from Google Patents.
US3119475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling grid system
Assignee: Rollform Inc
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Filing: 1961-12-14
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Granted: 1964-01-28
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Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 George C Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:47
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/065; E04B9/067; E04B9/068; E04B9/08; E04B9/10; E04B9/12; E04B9/122; Y; Y10; Y10S; Y10S52/00; Y10S52/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A GRID SYSTEM FOR AN ACOUSTICAL CEILING COMPRISING A PLURALITY OF MAIN GRID MEMBERS, A PLURALITY OF CROSS GRID MEMBERS, SAID MAIN GRID MEMBERS HAVING SPACED APERTURES THERETHROUGH, SAID CROSS GRID MEMBERS EXTENDING GENERALLY NORMALLY WITH RESPECT TO SAID MAIN GRID MEMBERS AND HAVING PORTIONS PROJECTING LONGITUDINALLY THEREFROM THROUGH THE APERTURES IN SAID MAIN GRID MEMBERS, RESPECTIVELY, LOCKING MEANS EXTENDING THROUGH THE PROJECTING PORTIONS ON SAID CROSS GRID MEMBERS, RESPECTIVELY, ON THE OPPOSITE SIDE OF SAID MAIN GRID MEMBERS FROM SAID CROSS GRID MEMBERS TO PREVENT RELATIVE MOVEMENT OF SAID MAIN AND CROSS GRID MEMBERS AWAY FROM ONE ANOTHER, AND A PLURALITY OF FUSIBLE SHEAR LINKS EXTENDING THROUGH SAID CROSS GRID MEMBERS AND ENGAGEABLE WITH SAID MAIN GRID MEMBERS ON THE OPPOSITE SIDE THEREOF FROM SAID LOCKING MEANS, RESPECTIVELY, SAID SHEAR LINKS NORMALLY LIMITING RELATIVE MOVEMENT OF SAID CROSS GRID MEMBERS TOWARD SAID
Claim 2
Dependent Claim
143 words
A GRID SYSTEM FOR AN ACOUSTICAL CEILING COMPRISING A PLURALITY OF MAIN GRID MEMBERS, A PLURALITY OF CROSS GRID MEMBERS, SAID MAIN GRID MEMBERS HAVING SPACED APERTURES THERETHROUGH, SAID CROSS GRID MEMBERS EXTENDING GENERALLY NORMALLY WITH RESPECT TO SAID MAIN GRID MEMBERS AND HAVING PORTIONS PROJECTING LONGITUDINALLY THEREFROM THROUGH THE APERTURES IN SAID MAIN GRID MEMBERS, RESPECTIVELY, LOCKING MEANS EXTENDING THROUGH THE PROJECTING PORTIONS ON SAID CROSS GRID MEMBERS, RESPECTIVELY, ON THE OPPOSITE SIDE OF SAID MAIN GRID MEMBERS FROM SAID CROSS GRID MEMBERS TO PREVENT RELATIVE MOVEMENT OF SAID MAIN AND CROSS GRID MEMBERS AWAY FROM ONE ANOTHER, AND A PLURALITY OF FUSIBLE SHEAR LINKS EXTENDING THROUGH SAID CROSS GRID MEMBERS AND ENGAGEABLE WITH SAID MAIN GRID MEMBERS ON THE OPPOSITE SIDE THEREOF FROM SAID LOCKING MEANS, RESPECTIVELY, SAID SHEAR LINKS NORMALLY LIMITING RELATIVE MOVEMENT OF SAID CROSS GRID MEMBERS TOWARD SAID
References Cited (Backward Citations)
US1079862A
Cited
US2148310A
Cited
US2540603A
Cited
US2829743A
Cited
US2909957A
Cited
US3013644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |