Patent US3352622A successfully refreshed from Google Patents.
US3352622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballpoint pens
Assignee: Individual
•
Filing: 1964-09-29
•
Granted: 1967-11-14
•
Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 Schachter Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:18
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
STOPPER MEANS FOR PREVENTING BACK LEAK OF FLUID CONTENT IN THE RESERVOIR OF A BALL PEN, SAID MEANS COMPRISING A POROUS STOPPER MEMBER OF FIBROUS MATERIAL POSITIONED ABOVE AND SEPARATED FROM THE LEVEL OF SAID FLUID BY AN AIR SPACE AND ADHERING FRICTIONALLY TO THE WALL RETAINING IT; SAID STOPPER MEMBER INCLUDING THE WHOLE EXTENT OF ITS PERIPHERAL ZONE OF CONTACT WITH THE WALL RETAINING IT BEING PERVIOUS TO AIR BUT IMPERVIOUS TO BOTH WATER AND ORGANIC
Claim 2
Dependent Claim
77 words
STOPPER MEANS FOR PREVENTING BACK LEAK OF FLUID CONTENT IN THE RESERVOIR OF A BALL PEN, SAID MEANS COMPRISING A POROUS STOPPER MEMBER OF FIBROUS MATERIAL POSITIONED ABOVE AND SEPARATED FROM THE LEVEL OF SAID FLUID BY AN AIR SPACE AND ADHERING FRICTIONALLY TO THE WALL RETAINING IT; SAID STOPPER MEMBER INCLUDING THE WHOLE EXTENT OF ITS PERIPHERAL ZONE OF CONTACT WITH THE WALL RETAINING IT BEING PERVIOUS TO AIR BUT IMPERVIOUS TO BOTH WATER AND ORGANIC
References Cited (Backward Citations)
BE570999A
Cited
US2672127A
Cited
DE806331C
Cited
US2730933A
Cited
US3056194A
Cited
GB815212A
Cited
US2979030A
Cited
US3030925A
Cited
US3008453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |