US3189139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling construction
Assignee: Eastern Products Corp
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Filing: 1962-06-26
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Granted: 1965-06-15
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Expires: 1982-06-26
Abstract
No abstract record available.
Inventors
- 👤 Znamirowski Henry
- 👤 Martin L Lydard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:12
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/065; E04B9/067; E04B9/068; E04B9/08; E04B9/12; E04B9/122; Y; Y10; Y10S; Y10S52/00; Y10S52/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A BEAM FOR USE IN A FIRE RETARDING STRUCTURAL CEILING SYSTEM COMPRISING A PAIR OF ELONGATED METAL STRIPS DISPOSED IN SIDE BY SIDE RELATIONSHIP AND FORMING AN UPSTANDING WEB, AN ELONGATED BULBOUS RIB JOINING THE TOPS OF SAID STRIPS, AND AN ELONGATED FLANGE EXTENDING LATERALLY FROM EACH SIDE OF THE BASE OF SAID WEB WHEREBY SAID BEAM HAS SUBSTANTIALLY AN INVERTED T CROSS SECTION, EACH OF SAID STRIPS HAVING AN OPENING EXTENDING UPWARDLY FROM THE BASE THEREOF AT AN INTERMEDIATE LOCATION IN THE LENGTH OF SAID BEAM, SAID OPENINGS BEING IN SUBSTANTIAL AXIAL ALIGNMENT, SAID OPENINGS FORMING AN EXPANSION RELIEF SPACE IN A LOWER PORTION OF SAID WEB, SAID RIB HAVING AN ELONGATED SLOT EXTENDING IN A SPERIAL PATH FROM ONE SIDE OF SAID WEB TO THE OTHER SIDE OF SAID WEB AND BEING IN SUBSTANTIAL AXIAL ALIGNMENT WITH SAID SPACE WHEREBY WHEN SAID BEAM IS SUBJECTED TO EXPANSION STRESSES ACCOMPANYING FIRE CONDITIONS SAID STRIPS WILL BUCKLE LATERALLY IN THE REGION ABOVE SAID OPENINGS AND SAID FLANGES WILL BUCKLE DOWNWARDLY IN THE REGION BELOW SAID OPENINGS THEREBY TO RELIEVE SAID EXPANSION STRESSES WITHOUT SUBSTANTIAL TWISTING OF SAID BEAM.
Claim 2
Dependent Claim
188 words
A BEAM FOR USE IN A FIRE RETARDING STRUCTURAL CEILING SYSTEM COMPRISING A PAIR OF ELONGATED METAL STRIPS DISPOSED IN SIDE BY SIDE RELATIONSHIP AND FORMING AN UPSTANDING WEB, AN ELONGATED BULBOUS RIB JOINING THE TOPS OF SAID STRIPS, AND AN ELONGATED FLANGE EXTENDING LATERALLY FROM EACH SIDE OF THE BASE OF SAID WEB WHEREBY SAID BEAM HAS SUBSTANTIALLY AN INVERTED T CROSS SECTION, EACH OF SAID STRIPS HAVING AN OPENING EXTENDING UPWARDLY FROM THE BASE THEREOF AT AN INTERMEDIATE LOCATION IN THE LENGTH OF SAID BEAM, SAID OPENINGS BEING IN SUBSTANTIAL AXIAL ALIGNMENT, SAID OPENINGS FORMING AN EXPANSION RELIEF SPACE IN A LOWER PORTION OF SAID WEB, SAID RIB HAVING AN ELONGATED SLOT EXTENDING IN A SPERIAL PATH FROM ONE SIDE OF SAID WEB TO THE OTHER SIDE OF SAID WEB AND BEING IN SUBSTANTIAL AXIAL ALIGNMENT WITH SAID SPACE WHEREBY WHEN SAID BEAM IS SUBJECTED TO EXPANSION STRESSES ACCOMPANYING FIRE CONDITIONS SAID STRIPS WILL BUCKLE LATERALLY IN THE REGION ABOVE SAID OPENINGS AND SAID FLANGES WILL BUCKLE DOWNWARDLY IN THE REGION BELOW SAID OPENINGS THEREBY TO RELIEVE SAID EXPANSION STRESSES WITHOUT SUBSTANTIAL TWISTING OF SAID BEAM.
References Cited (Backward Citations)
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 |