Patent US3221409A successfully refreshed from Google Patents.
US3221409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amalgam dispenser
Assignee: Individual
•
Filing: 1961-12-12
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Granted: 1965-12-07
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Expires: 1981-12-12
Abstract
No abstract record available.
Inventors
- 👤 Charles J Thiel
- 👤 Louis J Michaels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:42
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00593; A; A61; A61C; A61C5/00; A61C5/60; A61C5/62; B05C17/00503; B05C17/00516; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1558; Y10T74/1565; Y10T74/1566
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
AN AMALGAM DISPENSER COMPRISING, AN ELONGATED TUBULAR HOLDER HAVING A FITTING AT ITS FORWARD END, AN AMALGAM SUPPLY TUBE HAVING A FITTING AT ONE END THEREOF BY WHICH IT IS ATTACHED TO THE FITTING OF SAID HOLDER, THE REMAINING PORTION OF SAID TUBE BEING OF SUBSTANTIALLY UNIFORM INTERNAL DIAMETER THROUGHOUT ITS LENGTH, SAID TUBE ADAPTED TO BE PRE-LOADED WITH AMALGAM AND CONSTITUTING THE SOLE SOURCE OF SUPPLY OF AMALGAM TO BE DISPENSED, A PLUNGER SLIDABLY MOUNTED IN SAID HOLDER, SAID PLUNGER HAVING A FORWARD END PORTION TERMINATING ADJACENT THE REAR END OF SAID TUBE WHEN SAID TUBE PLUNGER IS REARWARDLY WITHDRAWN, SAID FORWARD END PORTION BEING ADAPTED TO PASS THROUGH SAID TUBE TO ITS END TO FORCE THE AMALGAM OUT OF SAID TUBE, A PLURALITY OF LONGITUDINALLY SPACED RATCHET TEETH ON SAID PLUNGER, A PAWL HAVING A LONGITUDINALLY MOVABLE PORTION ENGAGING SAID TEETH, A LEVER PIVOTED ON SAID HOLDER AND COOPERATING WITH SAID PAWL TO MOVE SAID PAWL FORWARDLY AND REARWARDLY TO MOVE SAID PLUNGER IN A FORWARD DIRECTION STEP-BY-STEP.
Claim 2
Dependent Claim
170 words
AN AMALGAM DISPENSER COMPRISING, AN ELONGATED TUBULAR HOLDER HAVING A FITTING AT ITS FORWARD END, AN AMALGAM SUPPLY TUBE HAVING A FITTING AT ONE END THEREOF BY WHICH IT IS ATTACHED TO THE FITTING OF SAID HOLDER, THE REMAINING PORTION OF SAID TUBE BEING OF SUBSTANTIALLY UNIFORM INTERNAL DIAMETER THROUGHOUT ITS LENGTH, SAID TUBE ADAPTED TO BE PRE-LOADED WITH AMALGAM AND CONSTITUTING THE SOLE SOURCE OF SUPPLY OF AMALGAM TO BE DISPENSED, A PLUNGER SLIDABLY MOUNTED IN SAID HOLDER, SAID PLUNGER HAVING A FORWARD END PORTION TERMINATING ADJACENT THE REAR END OF SAID TUBE WHEN SAID TUBE PLUNGER IS REARWARDLY WITHDRAWN, SAID FORWARD END PORTION BEING ADAPTED TO PASS THROUGH SAID TUBE TO ITS END TO FORCE THE AMALGAM OUT OF SAID TUBE, A PLURALITY OF LONGITUDINALLY SPACED RATCHET TEETH ON SAID PLUNGER, A PAWL HAVING A LONGITUDINALLY MOVABLE PORTION ENGAGING SAID TEETH, A LEVER PIVOTED ON SAID HOLDER AND COOPERATING WITH SAID PAWL TO MOVE SAID PAWL FORWARDLY AND REARWARDLY TO MOVE SAID PLUNGER IN A FORWARD DIRECTION STEP-BY-STEP.
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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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |