Patent US3211264A successfully refreshed from Google Patents.
US3211264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically controlled frictionless slat-type screen
Assignee: Individual
•
Filing: 1962-06-22
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Granted: 1965-10-12
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Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward C Streeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/264; E06B9/36; E06B2009/2643; E06B2009/2646
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A ELECTRICALLY ADJUSTABLE SCREEN COMPRISING A PLURALITY OF LOUVERS TURNABLE ABOUT PARALLEL TRANSVERSELY SPACED LONGITUDINAL AXES FROM A PREDETERMINED ANGLE OF REPOSE, A SEPRATE ROTOR ATTACHED TO EACH LOWER AND PERMANENTLY MAGNETIZED SUBSTANTIALLY PERPENDICULARLY TO ITS AXIS, AND COMMON COIL MEANS SPACED FORM AND OUT OF MECHANICAL CONTACT WITH SAID ROTORS FOR PRODUCING AND ADJUSTABLE MAGNETIC FIELD SUBSTANTIALLY PERPENDICULAR TO SAID AXES FOR EXERTING A TORQUE ON SAID ROTORS TO HOLD SAID LOUVERS AT AN ANGLE ADJUSTABLE ACCORDING TO THE STRENGTH OF SAID ADJUSTABLE FIELD.
Claim 2
Dependent Claim
85 words
A ELECTRICALLY ADJUSTABLE SCREEN COMPRISING A PLURALITY OF LOUVERS TURNABLE ABOUT PARALLEL TRANSVERSELY SPACED LONGITUDINAL AXES FROM A PREDETERMINED ANGLE OF REPOSE, A SEPRATE ROTOR ATTACHED TO EACH LOWER AND PERMANENTLY MAGNETIZED SUBSTANTIALLY PERPENDICULARLY TO ITS AXIS, AND COMMON COIL MEANS SPACED FORM AND OUT OF MECHANICAL CONTACT WITH SAID ROTORS FOR PRODUCING AND ADJUSTABLE MAGNETIC FIELD SUBSTANTIALLY PERPENDICULAR TO SAID AXES FOR EXERTING A TORQUE ON SAID ROTORS TO HOLD SAID LOUVERS AT AN ANGLE ADJUSTABLE ACCORDING TO THE STRENGTH OF SAID ADJUSTABLE FIELD.
References Cited (Backward Citations)
US2303442A
Cited
US2520273A
Cited
US2854071A
Cited
US2804923A
Cited
US2953723A
Cited
US2905871A
Cited
US3008070A
Cited
US3022549A
Cited
US3129471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |