US3120837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instruments having a retractable writing point
Assignee: Mentmore Manufacturing Co Ltd
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Filing: 1954-05-05
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Granted: 1964-02-11
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Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Johnson William Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:27
CPC Classifications
B; B43; B43K; B43K23/00; B43K23/016; B43K24/00; B43K24/02; B43K24/08; B43K24/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A WRITING INSTRUMENT COMPRISING A BARREL OPEN AT ITS OPPOSITE ENDS, A PEN UNIT SLIDABLY MOUNTED IN SAID BARREL AND HAVING A WRITING POINT AT ITS FORWARD END ADAPTED TO BE PROTRACTED AND RETRACTED THROUGH THE FORWARD END OF THE BARREL, SPRING MEANS CONSTANTLY URGING SAID UNIT TOWARD A RETRACTED POSITION WHEREIN THE WRITING POINT IS CONCEALED WITHIN THE BARREL, A PUSH MEMBER HAVING A PORTION PROJECTING THROUGH THE REAR END OF SAID BARREL AND SLIDABLY MOUNTED IN NON-ROTATABLE FASHION WITH RESPECT THERETO, SAID PUSH MEMBER BEING PROVIDED WITH DOWNWARDLY DIRECTED TEETH, A ROTATABLE MEMBER INTERPOSED BETWEEN SAID SPRING MEANS AND THE TEETH OF SAID PUSH MEMBER WHEREBY SAID SPRING MEANS FORCES THE ROTATABLE MEMBER AGAINST THE TEETH OF SAID PUSH MEMBER, AT LEAST ONE OF THE ENGAGING SURFACES OF THE TEETH OF THE PUSH MEMBER AND THE ROTATABLE MEMBER BEING INCLINED SO THAT THE FORCE OF ENGAGEMENT BETWEEN THE TEETH OF SAID PUSH MEMBER AND THE ENGAGING SURFACE OF THE ROTATABLE MEMBER CAUSED BY SAID SPRING ROTATABLY BIASES SAID ROTATABLE
Claim 2
Dependent Claim
171 words
A WRITING INSTRUMENT COMPRISING A BARREL OPEN AT ITS OPPOSITE ENDS, A PEN UNIT SLIDABLY MOUNTED IN SAID BARREL AND HAVING A WRITING POINT AT ITS FORWARD END ADAPTED TO BE PROTRACTED AND RETRACTED THROUGH THE FORWARD END OF THE BARREL, SPRING MEANS CONSTANTLY URGING SAID UNIT TOWARD A RETRACTED POSITION WHEREIN THE WRITING POINT IS CONCEALED WITHIN THE BARREL, A PUSH MEMBER HAVING A PORTION PROJECTING THROUGH THE REAR END OF SAID BARREL AND SLIDABLY MOUNTED IN NON-ROTATABLE FASHION WITH RESPECT THERETO, SAID PUSH MEMBER BEING PROVIDED WITH DOWNWARDLY DIRECTED TEETH, A ROTATABLE MEMBER INTERPOSED BETWEEN SAID SPRING MEANS AND THE TEETH OF SAID PUSH MEMBER WHEREBY SAID SPRING MEANS FORCES THE ROTATABLE MEMBER AGAINST THE TEETH OF SAID PUSH MEMBER, AT LEAST ONE OF THE ENGAGING SURFACES OF THE TEETH OF THE PUSH MEMBER AND THE ROTATABLE MEMBER BEING INCLINED SO THAT THE FORCE OF ENGAGEMENT BETWEEN THE TEETH OF SAID PUSH MEMBER AND THE ENGAGING SURFACE OF THE ROTATABLE MEMBER CAUSED BY SAID SPRING ROTATABLY BIASES SAID ROTATABLE
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |