Patent US3354598A successfully refreshed from Google Patents.
US3354598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating ceiling and suspension grid therefor
Assignee: Wood Conversion Co
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Filing: 1965-07-30
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Granted: 1967-11-28
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Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Merle A Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:22
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; E; E04; E04B; E04B9/00; E04B9/02; E04B9/06; E04B9/12; E04B9/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A GRID MEMBER FOR A SUSPENSION SYSTEM FOR SUPPORTING LAY-IN CEILING PANELS, COMPRISING A STRUCTURE T-SHAPED IN CROSS-SECTION HAVING A VERTICAL PORTION AND OPPOSITELY DIRECTED HORIZONTAL FLANGES EXTENDING FROM THE BOTTOM OF THE VERTICAL PORTION, SAID VERTICAL PORTION COMPRISING AN L-SHAPED MEMBER CONSISTING OF ONE OF SAID FLANGES AND A VERTICAL LEG OF LENGTH SHORT OF THE LENGTH OF SAID VERTICAL PORTION, AND FURTHER COMPRISING A COMPLEMENTARY SPACEFORMING WEB PORTION APPRECIABLY LONGER THAN SAID LEG OF THE L AND PARALLEL TO IT WHEN AN INTERVENING SPACE OPENING ALONG THE LENGTH OF THE GRID MEMBER BETWEEN SAID TWO FLANGES, SAID WEB MEMBER HAVING INTEGRAL THEREWITH A RIGIDIFYING HEAD OF RECTANGULAR CROSS-SECTION WITH ONE SIDE FLUSH WITH THE SAID LEG OF SAID L-SHAPED MEMBER AND AN OPPOSING SIDE FLUSH WITH SAID WEB PORTION, SAID L-SHAPED
Claim 2
Dependent Claim
133 words
A GRID MEMBER FOR A SUSPENSION SYSTEM FOR SUPPORTING LAY-IN CEILING PANELS, COMPRISING A STRUCTURE T-SHAPED IN CROSS-SECTION HAVING A VERTICAL PORTION AND OPPOSITELY DIRECTED HORIZONTAL FLANGES EXTENDING FROM THE BOTTOM OF THE VERTICAL PORTION, SAID VERTICAL PORTION COMPRISING AN L-SHAPED MEMBER CONSISTING OF ONE OF SAID FLANGES AND A VERTICAL LEG OF LENGTH SHORT OF THE LENGTH OF SAID VERTICAL PORTION, AND FURTHER COMPRISING A COMPLEMENTARY SPACEFORMING WEB PORTION APPRECIABLY LONGER THAN SAID LEG OF THE L AND PARALLEL TO IT WHEN AN INTERVENING SPACE OPENING ALONG THE LENGTH OF THE GRID MEMBER BETWEEN SAID TWO FLANGES, SAID WEB MEMBER HAVING INTEGRAL THEREWITH A RIGIDIFYING HEAD OF RECTANGULAR CROSS-SECTION WITH ONE SIDE FLUSH WITH THE SAID LEG OF SAID L-SHAPED MEMBER AND AN OPPOSING SIDE FLUSH WITH SAID WEB PORTION, SAID L-SHAPED
References Cited (Backward Citations)
US2920357A
Cited
US2954727A
Cited
US3101661A
Cited
US3304684A
Cited
US3308586A
Cited
US3290075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |