Patent US3178884A successfully refreshed from Google Patents.
US3178884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse rocket
Assignee: Marquardt Corp
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Filing: 1960-11-14
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Granted: 1965-04-20
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Warren P Boardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:36
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A PULSE ROCKET COMPRISING AN INJECTOR BLOCK, A COMBUSTION CHAMBER SECURED TO SAID BLOCK AND EXHAUSTING THROUGH A NOZZLE, A PAIR OF OPENINGS IN SAID BLOCK IN COMMUNICATION WITH THE INTERIOR OF SAID COMBUSTION CHAMBER, AN INJECTOR PLUNGER SLIDABLE IN EACH OF SAID OPENINGS WITH THE SLIDING SURFACE OF SAID PLUNGER IN SEALING COMPRISING WITH THE SURFACE OF SAID OPENING, EACH PLUNGER COMPRISING AN ELONGATED BODY AND HAVING AN ELONGATED SURFACE GROOVE TO PROVIDE A MANIFOLD, A PASSAGE IN EACH OF SAID PLUNGERS FOR CONNECTING SAID MANIFOLD WITH THE EXTERIOR OF SAID PLUNGER THROUGH AN ORIFICE END OF THE PASSAGE, MEANS FOR RECIPROCATING BOTH SAID PLUNGERS TOGETHER TO MOVE SAID ORIFICE ENDS OF SAID PASSAGES INTO AND OUT OF SAID COMBUSTION CHAMBER, SAID ORIFICE ENDS BEING CLOSED BY SAID BLOCK WHEN OUT OF SAID COMBUSTION CHAMBER, A FUEL CONDUIT IN SAID BLOCK CONTINUALLY IN COMMUNICATION WITH THE MANIFOLD FOR ONE OF SAID PLUNGERS, AND AN OXIDIZER CONDUIT IN SAID BLOCK CONTINUALLY IN COMMUNICATION WITH THE MANIFOLD FOR THE OTHER OF SAID PLUNGERS, THE ORIFICE ENDS OF SAID PASSAGES DIRECTING FUEL AND OXIDIZER TOGETHER FOR COMBUSTION WHILE THE ENDS ARE WITHIN SAID COMBUSTION CHAMBER.
Claim 2
Dependent Claim
193 words
A PULSE ROCKET COMPRISING AN INJECTOR BLOCK, A COMBUSTION CHAMBER SECURED TO SAID BLOCK AND EXHAUSTING THROUGH A NOZZLE, A PAIR OF OPENINGS IN SAID BLOCK IN COMMUNICATION WITH THE INTERIOR OF SAID COMBUSTION CHAMBER, AN INJECTOR PLUNGER SLIDABLE IN EACH OF SAID OPENINGS WITH THE SLIDING SURFACE OF SAID PLUNGER IN SEALING COMPRISING WITH THE SURFACE OF SAID OPENING, EACH PLUNGER COMPRISING AN ELONGATED BODY AND HAVING AN ELONGATED SURFACE GROOVE TO PROVIDE A MANIFOLD, A PASSAGE IN EACH OF SAID PLUNGERS FOR CONNECTING SAID MANIFOLD WITH THE EXTERIOR OF SAID PLUNGER THROUGH AN ORIFICE END OF THE PASSAGE, MEANS FOR RECIPROCATING BOTH SAID PLUNGERS TOGETHER TO MOVE SAID ORIFICE ENDS OF SAID PASSAGES INTO AND OUT OF SAID COMBUSTION CHAMBER, SAID ORIFICE ENDS BEING CLOSED BY SAID BLOCK WHEN OUT OF SAID COMBUSTION CHAMBER, A FUEL CONDUIT IN SAID BLOCK CONTINUALLY IN COMMUNICATION WITH THE MANIFOLD FOR ONE OF SAID PLUNGERS, AND AN OXIDIZER CONDUIT IN SAID BLOCK CONTINUALLY IN COMMUNICATION WITH THE MANIFOLD FOR THE OTHER OF SAID PLUNGERS, THE ORIFICE ENDS OF SAID PASSAGES DIRECTING FUEL AND OXIDIZER TOGETHER FOR COMBUSTION WHILE THE ENDS ARE WITHIN SAID COMBUSTION CHAMBER.
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |