Patent US3558233A successfully refreshed from Google Patents.
US3558233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary actuating mechanism for writing instrument
Assignee: Individual
•
Filing: 1969-04-21
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Granted: 1971-01-26
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Expires: 1989-04-21
Abstract
Abstract THE CLIP BALL IS MANUALLY PRESSED INWARDLY TO CONTACT A PAIR OF CRANK ARMS THAT STRADDLE A CARTRIDGE AND ROTATE TO PRESS AGAINST A SHOULDER OF THE CARTRIDGE TO EXTEND THE WRITING TIP. AS COMPRESSION SRPING NORMALLY RETRACTS THE WRITING TIP WITHIN THE BARREL. THE CLIP IS NOT ONLY HINGED TO THE BARREL BUT ALSO SLIDES SO THAT THE CLIP BALL CAN BE MOVED OUT OF ALIGNMENT WITH THE CRANK ARMS WHEN THE PEN IS NOT IN USE. THIS PROVIDES A SAFETY AGAINST ACCIDENTAL EXTENSION OF THE WRITING TIP.
Inventors
- 👤 Nathan A Zepell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:36
CPC Classifications
B; B43; B43K; B43K24/00; B43K24/02
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |