US3074380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball point pen incorporating a grease plug and method of inhibiting penetration of ink into the plug
Assignee: Sunoco Inc
•
Filing: 1960-04-13
•
Granted: 1963-01-22
•
Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur T Polishuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:11
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
THE METHOD OF INHIBITING INK PENETRATION OF A LUBRICATING GREASE-TYPE PLUG IN A FOUNTAIN PEN RESERVOIR IN CON-
Claim 2
Independent Claim
18 words
THE METHOD OF INHIBITING INK PENETRATION OF A LUBRICATING GREASE-TYPE PLUG IN A FOUNTAIN PEN RESERVOIR IN CON-
Claim 3
Dependent Claim
40 words
IN A BALL POINT PEN CARTRIDGE WHEREIN A LIBRICATING GREASE PLUG IS USED TO HOLD THE INK IN PLACE, THE IMPROVEMENT CONSISTING OF INCORPORATING IN THE SAID PLUG A SMALL AMOUNT OF POWDERED METAL WHICH IS INERT TO INK COMPOSITIONS.
Claim 4
Dependent Claim
40 words
IN A BALL POINT PEN CARTRIDGE WHEREIN A LIBRICATING GREASE PLUG IS USED TO HOLD THE INK IN PLACE, THE IMPROVEMENT CONSISTING OF INCORPORATING IN THE SAID PLUG A SMALL AMOUNT OF POWDERED METAL WHICH IS INERT TO INK COMPOSITIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |