US3587131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curtain guide rail assembly
Assignee: Individual
•
Filing: 1969-03-07
•
Granted: 1971-06-28
•
Expires: 1989-03-07
Abstract
Abstract A DEVICE FOR THE INTRODUCTION AND EXTRACTION OF DISPLACEABLE CURTAIN CARRIER ELEMENTS INTO AND OUT OF GUIDE RAILS. OPENINGS ARE PROVIDED ON THE UNDERSIDE OF THE GUIDE RAILS WITH YIELDABLE SECURED TRACK SECTIONS WHICH SERVE TO OPEN AND CLOSE SAID OPENINGS FOR THE PLACEMENT AND REMOVAL OF THE CARRIER ELEMENTS. A PORTABLE CURTAIN RAIL, ADAPTED TO CARRY A PLURALITY OF CARRIER ELEMENTS, MAY BE LOCKED ONTO AN OPENING SUCH THAT THE ELEMENTS MAY BE INSERTED BY MEANS OF AN INTERNAL CORE ELEMENT WITHIN THE RAIL.
Inventors
- 👤 Peter Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:47
CPC Classifications
A; A47; A47H; A47H13/00; A47H15/00; A47H2015/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |