Patent US3352076A successfully refreshed from Google Patents.
US3352076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airflow grid structure for air distribution through metal lath and plaster ceilings
Assignee: Wheeling Steel Corp
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Filing: 1966-01-18
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Granted: 1967-11-14
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Expires: 1986-01-18
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:52
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/10; E; E04; E04B; E04B9/00; E04B9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
AN AIRFLOW GRID STRUCTURE IN A PLASTER CEILING COMPRISING OPPOSED SEPARATE MEMBRS EACH HAVING AN UPRIGHT LEG AND A HORIZONTAL WING EXTENDING FROM THE TOP OF THE LEG, THE LEGS BEING SPACED APART AND SUBSTANTIALLY PARALLEL AND EACH WING EXTENDING IN THE DIRECTION AWAY FROM THE OPPOSED MEMBER, EACH WING HAVING A FORAMINOUS PORTION ATTACHED TO A SHEET OF EXPANDABLE METAL LATH IN SAID PLASTER CEILING, AND A SEPARATE ELEMENT SPANNING THE SPACE BETWEEN THE LEGS AND HAVING AIRFLOW OPENINGS THERETHROUGH.
Claim 2
Dependent Claim
81 words
AN AIRFLOW GRID STRUCTURE IN A PLASTER CEILING COMPRISING OPPOSED SEPARATE MEMBRS EACH HAVING AN UPRIGHT LEG AND A HORIZONTAL WING EXTENDING FROM THE TOP OF THE LEG, THE LEGS BEING SPACED APART AND SUBSTANTIALLY PARALLEL AND EACH WING EXTENDING IN THE DIRECTION AWAY FROM THE OPPOSED MEMBER, EACH WING HAVING A FORAMINOUS PORTION ATTACHED TO A SHEET OF EXPANDABLE METAL LATH IN SAID PLASTER CEILING, AND A SEPARATE ELEMENT SPANNING THE SPACE BETWEEN THE LEGS AND HAVING AIRFLOW OPENINGS THERETHROUGH.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |