Patent US5392415A successfully refreshed from Google Patents.
Patent US3154055A successfully refreshed from Google Patents.
US3154055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fountain pen
Assignee: Parker Pen Co
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Filing: 1960-12-07
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Granted: 1964-10-27
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Expires: 1980-12-07
Abstract
No abstract record available.
Inventors
- 👤 Ray A Lawton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:05
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/02; B43K5/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
246 words
IN A FOUNTAIN PEN HAVING A VACUUM TYPE INK RESERVOIR, A WRITING NIB, AND AN INK FEED AND CONTROL MECHANISM FOR CONVEYING INK FROM SAID RESERVOIR TO SAID WRITING NIB, SAID INK FEED AND CONTROL MECHANISM COMPRISING A FEED BAR HAVING FIRST AND SECOND LONGITUDINALLY EXTENDING CAPILLARY GROOVES DISPOSED THEREIN IN PARTIALLY OVERLAPPING SIDE-BY-SIDE RELATIONSHIP, SAID NIB BEING MOUNTED OVER ONE END OF SAID FEED BAR AND THE OPPOSITE END OF SAID FEED BAR EXTENDING INTO SAID RESERVOIR WHEREIN IT IS NORMALLY BATHED IN INK, SAID SECOND CAPILLARY GROOVE EXTENDING FROM SAID RESERVOIR TO A LOCATION REMOTE FROM SAID NIB, SAID FIRST CAPILLARY GROOVE EXTENDING FROM BENEATH SAID NIB TO A LOCATION REMOTE FROM SAID RESERVOIR, SAID FEED BAR HAVING AN INTERMEDIATE PORTION AT THE LOCATION OF THE OVERLAPPING PORTIONS OF SAID CAPILLARY GROOVES HAVING AN EXTERNAL DIAMETER SUBSTANTIALLY LESS THAN THE ADJACENT PORTIONS OF THE FEED BAR, A CYLINDRICAL COLLECTOR PLUG LOOSELY SURROUNDING AT LEAST SAID LESSENED DIAMETER PORTION OF SAID FEED BAR AND HAVING AN INTERNAL DIAMETER SUBSTANTIALLY GREATER THAN THE EXTERNAL DIAMETER OF SAID FEED BAR AT SAID PORTION TO PROVIDE AN ANNULAR WEIR CHAMBER OF CAPILLARY DIMENSION SURROUNDING SAID FEED BAR AND THE UPPER PORTIONS OF SAID SECOND CAPILLARY GROOVE, SAID SECOND CAPILLARY GROOVE HAVING AN ENLARGED UPPER PORTION OF GREATER THAN CAPILLARY DIMENSION COMMUNICATING THE REDUCED DIAMETER PORTION OF SAID FEED BAR TO SAID RESERVOIR TO PROVIDE A PASSAGEWAY FOR THE TRANSFER OF AIR FROM SAID WEIR CHAMBER TO SAID RESERVOIR.
Claim 2
Dependent Claim
246 words
IN A FOUNTAIN PEN HAVING A VACUUM TYPE INK RESERVOIR, A WRITING NIB, AND AN INK FEED AND CONTROL MECHANISM FOR CONVEYING INK FROM SAID RESERVOIR TO SAID WRITING NIB, SAID INK FEED AND CONTROL MECHANISM COMPRISING A FEED BAR HAVING FIRST AND SECOND LONGITUDINALLY EXTENDING CAPILLARY GROOVES DISPOSED THEREIN IN PARTIALLY OVERLAPPING SIDE-BY-SIDE RELATIONSHIP, SAID NIB BEING MOUNTED OVER ONE END OF SAID FEED BAR AND THE OPPOSITE END OF SAID FEED BAR EXTENDING INTO SAID RESERVOIR WHEREIN IT IS NORMALLY BATHED IN INK, SAID SECOND CAPILLARY GROOVE EXTENDING FROM SAID RESERVOIR TO A LOCATION REMOTE FROM SAID NIB, SAID FIRST CAPILLARY GROOVE EXTENDING FROM BENEATH SAID NIB TO A LOCATION REMOTE FROM SAID RESERVOIR, SAID FEED BAR HAVING AN INTERMEDIATE PORTION AT THE LOCATION OF THE OVERLAPPING PORTIONS OF SAID CAPILLARY GROOVES HAVING AN EXTERNAL DIAMETER SUBSTANTIALLY LESS THAN THE ADJACENT PORTIONS OF THE FEED BAR, A CYLINDRICAL COLLECTOR PLUG LOOSELY SURROUNDING AT LEAST SAID LESSENED DIAMETER PORTION OF SAID FEED BAR AND HAVING AN INTERNAL DIAMETER SUBSTANTIALLY GREATER THAN THE EXTERNAL DIAMETER OF SAID FEED BAR AT SAID PORTION TO PROVIDE AN ANNULAR WEIR CHAMBER OF CAPILLARY DIMENSION SURROUNDING SAID FEED BAR AND THE UPPER PORTIONS OF SAID SECOND CAPILLARY GROOVE, SAID SECOND CAPILLARY GROOVE HAVING AN ENLARGED UPPER PORTION OF GREATER THAN CAPILLARY DIMENSION COMMUNICATING THE REDUCED DIAMETER PORTION OF SAID FEED BAR TO SAID RESERVOIR TO PROVIDE A PASSAGEWAY FOR THE TRANSFER OF AIR FROM SAID WEIR CHAMBER TO SAID RESERVOIR.
Claim 3
Dependent Claim
217 words
IN A FOUNTAIN PEN HAVING A VACUUM TYPE INK RESERVOIR AND A WRITING NIB, AN INK FEED AND CONTROL MECHANISM COMPRISING MEANS DEFINING AN ANNULAR WEIR CHAMBER OF SUFFICIENT SIZE TO PERMIT AIR BUBBLES TO PASS THROUGH A LIQUID INK CONTAINED THEREIN, SAID WEIR CHAMBER BEING OF CAPILLARY SIZE AND DISPLACED FROM BOTH SAID NIB AND SAID RESERVIOR, MEANS DEFINING A CAPILLARY CHANNEL REMOTE FROM SAID NIB AND CONNECTED BETWEEN SAID RESERVOIR AND SAID WEIR CHAMBER FOR CARRYING INK FROM SAID RESERVOIR TO SAID WEIR CHAMBER, MEANS DEFINING A CAPILLARY CHANNEL REMOTE FROM SAID RESERVOIR AND CONNECTED BETWEEN SAID WEIR CHAMBER AND SAID NIB FOR CARRYING INK FROM SAID WEIR CHAMBER TO SAID NIB, SAID CAPILLARY CHANNELS BEING IN MUTUALLY UNALIGNED OVERLAPPING RELATIONSHIP WITH THE OVERLAPPING PORTIONS THEREOF BEING DISPOSED WITHIN SAID WEIR CHAMBERS, MEANS DEFINING AN AIR PASSAGEWAY REMOTE FROM SAID CHANNELS CONNECTING SAID WEIR CHAMBER TO THE EXTERIOR OF SAID PEN FOR SUPPLYING AIR AT SUBSTANTIALLY ATMOSPHERIC PRESSURE TO SAID WEIR CHAMBER, SAID AIR PASSAGEWAY HAVING A LOWER FORCE OF CAPILLARY ATTRACTION ON THE INK IN SAID WEIR CHAMBER THAN THE CAPILLARY FORCE OF ATTRACTION EXERTED THEREON BY SAID WEIR CHAMBER, AND MEANS DEFINING A NON-CAPILLARY PASSAGEWAY CONNECTING SAID WEIR CHAMBER TO SAID RESERVOIR FOR CARRYING REPLACEMENT AIR FROM SAID WEIR CHAMBER TO SAID RESERVOIR.
Claim 4
Dependent Claim
217 words
IN A FOUNTAIN PEN HAVING A VACUUM TYPE INK RESERVOIR AND A WRITING NIB, AN INK FEED AND CONTROL MECHANISM COMPRISING MEANS DEFINING AN ANNULAR WEIR CHAMBER OF SUFFICIENT SIZE TO PERMIT AIR BUBBLES TO PASS THROUGH A LIQUID INK CONTAINED THEREIN, SAID WEIR CHAMBER BEING OF CAPILLARY SIZE AND DISPLACED FROM BOTH SAID NIB AND SAID RESERVIOR, MEANS DEFINING A CAPILLARY CHANNEL REMOTE FROM SAID NIB AND CONNECTED BETWEEN SAID RESERVOIR AND SAID WEIR CHAMBER FOR CARRYING INK FROM SAID RESERVOIR TO SAID WEIR CHAMBER, MEANS DEFINING A CAPILLARY CHANNEL REMOTE FROM SAID RESERVOIR AND CONNECTED BETWEEN SAID WEIR CHAMBER AND SAID NIB FOR CARRYING INK FROM SAID WEIR CHAMBER TO SAID NIB, SAID CAPILLARY CHANNELS BEING IN MUTUALLY UNALIGNED OVERLAPPING RELATIONSHIP WITH THE OVERLAPPING PORTIONS THEREOF BEING DISPOSED WITHIN SAID WEIR CHAMBERS, MEANS DEFINING AN AIR PASSAGEWAY REMOTE FROM SAID CHANNELS CONNECTING SAID WEIR CHAMBER TO THE EXTERIOR OF SAID PEN FOR SUPPLYING AIR AT SUBSTANTIALLY ATMOSPHERIC PRESSURE TO SAID WEIR CHAMBER, SAID AIR PASSAGEWAY HAVING A LOWER FORCE OF CAPILLARY ATTRACTION ON THE INK IN SAID WEIR CHAMBER THAN THE CAPILLARY FORCE OF ATTRACTION EXERTED THEREON BY SAID WEIR CHAMBER, AND MEANS DEFINING A NON-CAPILLARY PASSAGEWAY CONNECTING SAID WEIR CHAMBER TO SAID RESERVOIR FOR CARRYING REPLACEMENT AIR FROM SAID WEIR CHAMBER TO SAID RESERVOIR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |