Patent US3159252A successfully refreshed from Google Patents.
US3159252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant ceiling suspension system
Assignee: Celotex Corp
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Filing: 1961-05-25
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Granted: 1964-12-01
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Expires: 1981-05-25
Abstract
No abstract record available.
Inventors
- 👤 Ronald F Cotts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:21
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/065; E04B9/067; E04B9/08; Y; Y10; Y10S; Y10S52/00; Y10S52/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SUSPENSION MEMBER FOR A CEILING SUSPENSION SYSTEM COMPRISING AN ELONGATED CENTRAL WEB PORTION HAVING A SLOT IN ITS LOWER EDGE INTERMEDIATE ITS ENDS, A DISCONTINUOUS REINFORCING BEAD EXTENDING INTEGRALLY WITH SAID WEB PORTION ALONG THE TOP EDGE THEREOF, SAID DISCONTINUITY BEING IN REGISTRATION WITH SAID SLOT IN SAID WEB PORTION, AND A PAIR OF FLANGES EXTENDING TRANSVERSELY TO SAID WEB PORTION ONE OF SAID FLANGES BEING FORMED OF TWO SHEETS FOLDED ONE OVER THE OTHER, THE UPPER ONE OF SAID
Claim 2
Dependent Claim
81 words
A SUSPENSION MEMBER FOR A CEILING SUSPENSION SYSTEM COMPRISING AN ELONGATED CENTRAL WEB PORTION HAVING A SLOT IN ITS LOWER EDGE INTERMEDIATE ITS ENDS, A DISCONTINUOUS REINFORCING BEAD EXTENDING INTEGRALLY WITH SAID WEB PORTION ALONG THE TOP EDGE THEREOF, SAID DISCONTINUITY BEING IN REGISTRATION WITH SAID SLOT IN SAID WEB PORTION, AND A PAIR OF FLANGES EXTENDING TRANSVERSELY TO SAID WEB PORTION ONE OF SAID FLANGES BEING FORMED OF TWO SHEETS FOLDED ONE OVER THE OTHER, THE UPPER ONE OF SAID
References Cited (Backward Citations)
US2689630A
Cited
GB755104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |