US3189138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling construction
Assignee: Eastern Products Corp
•
Filing: 1961-10-24
•
Granted: 1965-06-15
•
Expires: 1981-10-24
Abstract
No abstract record available.
Inventors
- 👤 Znamirowski Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:05
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/12; E04B9/127; E04B9/065; E04B9/067; E04B9/068; E04B9/08; E04B9/10; Y; Y10; Y10S; Y10S52/00; Y10S52/05; Y10T; Y10T403/00; Y10T403/70; Y10T403/7001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A BEAM FOR USE IN A FIRE RETARDING STRUCTURAL SYSTEM, COMPRISING AN UPSTANDING WEB PORTION AND A HORIZONTAL FLANGE PORTION, SAID WEB PORTION HAVING AN OPENING FORMING AN EXPANSION RELIEF SPACE EXTENDING FROM SAID FLANGE THROUGH THE OPPOSITE EDGE OF SAID BEAM, SAID SPACE BEING POSITIONED INTERMEDIATE THE ENDS OF SAID BEAM, SAID OPENING HAVING A LENGTH TAKEN ALONG THE LENGTH OF SAID BEAM SELECTED TO ACCOMMODATE ANTICIPATED AXIAL EXPANSION OF SAID WEB PORTION UPON EXPOSURE TO A FIRE TO THEREBY PREVENT LATERAL BUCKLING OF SAID WEB PORTION, SAID OPENING HAVING AN AXIALLY ELONGATED PORTION INTERMEDIATE SAID FLANGE AND SAID OPPOSITE EDGE, THE OPPOSITE SIDES OF SAID OPENING BETWEEN SAID ELONGATED PORTION AND SAID FLANGE BEING CONVERGENT TOWARD EACH OTHER TO THEIR LINE OF JUNCTURE WITH SAID FLANGE TO CAUSE BUCKLING OF SAID FLANGE BELOW SAID OPENING WHEN SAID BEAM IS EXPOSED TO FIRE.
Claim 2
Dependent Claim
144 words
A BEAM FOR USE IN A FIRE RETARDING STRUCTURAL SYSTEM, COMPRISING AN UPSTANDING WEB PORTION AND A HORIZONTAL FLANGE PORTION, SAID WEB PORTION HAVING AN OPENING FORMING AN EXPANSION RELIEF SPACE EXTENDING FROM SAID FLANGE THROUGH THE OPPOSITE EDGE OF SAID BEAM, SAID SPACE BEING POSITIONED INTERMEDIATE THE ENDS OF SAID BEAM, SAID OPENING HAVING A LENGTH TAKEN ALONG THE LENGTH OF SAID BEAM SELECTED TO ACCOMMODATE ANTICIPATED AXIAL EXPANSION OF SAID WEB PORTION UPON EXPOSURE TO A FIRE TO THEREBY PREVENT LATERAL BUCKLING OF SAID WEB PORTION, SAID OPENING HAVING AN AXIALLY ELONGATED PORTION INTERMEDIATE SAID FLANGE AND SAID OPPOSITE EDGE, THE OPPOSITE SIDES OF SAID OPENING BETWEEN SAID ELONGATED PORTION AND SAID FLANGE BEING CONVERGENT TOWARD EACH OTHER TO THEIR LINE OF JUNCTURE WITH SAID FLANGE TO CAUSE BUCKLING OF SAID FLANGE BELOW SAID OPENING WHEN SAID BEAM IS EXPOSED TO FIRE.
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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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |