Patent US3672783A successfully refreshed from Google Patents.
US3672783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twist-action retracting mechanism for use in writing instruments
Assignee: Accutec Inc
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Filing: 1970-08-25
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Granted: 1972-06-27
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Expires: 1990-08-25
Abstract
Abstract A TWIST-ACTION RETRACTING MECHANISM FOR USE IN WRITING INSTRUMENTS WITH FORWARD AND REARWARD BARRELS. THE OPERATING MECHANISM INCLUDES A TUBULAR ADAPTER HAVING A HELICAL SLOT ON THE INSIDE SURFACE AND SHAPED TO PERMIT MOUNTING OF THE ADAPTER WITHIN THE REARWARD END OF THE FORWARD BARREL. A HOLLOW INSERT MEMBER IS SHAPED TO ENGAGE THE INSIDE OF THE REARWARD BARREL AND TO RECEIVE THE REARWARD END OF THE WRITING CARTRIDGE. THE INSERT MEMBER ALSO INCLUDES A PLURALITY OF DISCRETE PROJECTIONS EXTENDING OUTWARDLY FOR ENGAGING THE HELICAL SLOT OF THE ADAPTER. ROTATION OF THE INSERT MEMBER WITHIN THE ADAPTER CAUSES AXIAL MOVEMENT OF THE INSERT MEMBER AND THE WRITING CARTRIDGE.
Inventors
- 👤 Harold F Bajusz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:28
CPC Classifications
B; B43; B43K; B43K24/00; B43K24/02; B43K24/06
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |