Patent US3221636A successfully refreshed from Google Patents.
US3221636A
Expired / Lapsed
US
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Louvered ventilator
Assignee: SMITH
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Filing: 1964-11-27
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Granted: 1965-12-07
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Lester L Smith
- 👤 Frank E Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A LOUVERED VENTILATOR INTEGRALLY FORMED FROM SHEET STOCK AND COMPRISING, IN COMBINATION, A PANEL OF SHEET STOCK HAVING THEREIN A PLURALITY OF INTEGRALLY FORMED LOUVERS PROJECTING FROM ONE FACE OF THE SHEET STOCK AND EACH OVERLYING A VENT OPENING AND HAVING A FREE LONGITUDINAL EDGE, SAID LOUVERS EACH HAVING END PORTIONS CURVED IN RESPECT TO PLANES WHICH ARE TRANSVERSE TO ONE ANOTHER AND NORMAL TO THE PANEL, SAID LOUVERS ALSO HAVING MID-PORTIONS WHICH ARE SUBSTANTIALLY STRAIGHT LONGITUDINALLY, AND SAID END PORTIONS OF EACH LOUVER INCLUDING COINED REGIONS WHICH EMBODY PREESTABLISHED VARIATIONS IN MATERIAL THICKNESS IN ADDITION TO THOSE NORMALLY EFFECTED BY LOUVER FORMATION AND WHICH VARIATIONS EXTEND BOTH LATERALLY AND LONGITUDINALLY OF SAID LONGITUDINAL EDGE.
Claim 2
Dependent Claim
115 words
A LOUVERED VENTILATOR INTEGRALLY FORMED FROM SHEET STOCK AND COMPRISING, IN COMBINATION, A PANEL OF SHEET STOCK HAVING THEREIN A PLURALITY OF INTEGRALLY FORMED LOUVERS PROJECTING FROM ONE FACE OF THE SHEET STOCK AND EACH OVERLYING A VENT OPENING AND HAVING A FREE LONGITUDINAL EDGE, SAID LOUVERS EACH HAVING END PORTIONS CURVED IN RESPECT TO PLANES WHICH ARE TRANSVERSE TO ONE ANOTHER AND NORMAL TO THE PANEL, SAID LOUVERS ALSO HAVING MID-PORTIONS WHICH ARE SUBSTANTIALLY STRAIGHT LONGITUDINALLY, AND SAID END PORTIONS OF EACH LOUVER INCLUDING COINED REGIONS WHICH EMBODY PREESTABLISHED VARIATIONS IN MATERIAL THICKNESS IN ADDITION TO THOSE NORMALLY EFFECTED BY LOUVER FORMATION AND WHICH VARIATIONS EXTEND BOTH LATERALLY AND LONGITUDINALLY OF SAID LONGITUDINAL EDGE.
References Cited (Backward Citations)
US2663246A
Cited
US2785507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |