US3220718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operator
Assignee: Republic Industries Inc
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Filing: 1963-05-09
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Granted: 1965-11-30
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Lance A Wikkerink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:45
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/673; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19735
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A DOOR OPERATOR COMPRISING A LONGITUDINALLY SLOTTED TUBULR TRACK, A SCREW ROTATABLY SUPPORTED WITHIN SAID TRACK, REVERSIBLE MEANS FOR ROTATING SCREW, A NUT ON SAID SCREW, MEANS CONNECTED TO SAID NUT AND EXTENDING THROUGH SAID SLOT AND ADAPTED FOR CONNECTION TO A DOOR, AND A RESILIENTLY COMPRESSIBLE FILLER WITHIN SAID TUBULAR TRACK CLOSELY ENCOMPASSING AND SUPPORTING SAID SCREW AND ADAPTED TO YIELD LOCALLY TO PERMIT THE PASSAGE OF SAID NUT ALONG SAID SCREW.
Claim 2
Dependent Claim
73 words
A DOOR OPERATOR COMPRISING A LONGITUDINALLY SLOTTED TUBULR TRACK, A SCREW ROTATABLY SUPPORTED WITHIN SAID TRACK, REVERSIBLE MEANS FOR ROTATING SCREW, A NUT ON SAID SCREW, MEANS CONNECTED TO SAID NUT AND EXTENDING THROUGH SAID SLOT AND ADAPTED FOR CONNECTION TO A DOOR, AND A RESILIENTLY COMPRESSIBLE FILLER WITHIN SAID TUBULAR TRACK CLOSELY ENCOMPASSING AND SUPPORTING SAID SCREW AND ADAPTED TO YIELD LOCALLY TO PERMIT THE PASSAGE OF SAID NUT ALONG SAID SCREW.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |