US3606525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring for eyeglass frames
Assignee: Individual
•
Filing: 1969-10-24
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Granted: 1971-09-20
•
Expires: 1989-10-24
Abstract
Abstract AN ELONGATED PIECE OF RESILIENT WIRE FORMED INTO A TORSION COIL SPRING WITH END PORTIONS EXTENDING OUTWARDLY THEREFROM, THE END PORTIONS FORMED TO ENGAGE THE FRAME TO PREVENT RELATIVE TRANSVERSE MOVEMENT THEREBETWEEN WHILE ALLOWING LONGITUDINAL MOVEMENT AND BIASING THE ARMS OF THE FRAME INWARDLY TOWARD THE LENS HOLDING PORTION.
Inventors
- 👤 Bert J Landree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:58
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/008; G02C5/22; G02C5/2218; G02C5/2227; G02C5/2254; G02C2200/00; G02C2200/10; G02C2200/28
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |