US3253405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion cooled rocket nozzle
Assignee: Motors Liquidation Co
•
Filing: 1963-06-10
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Granted: 1966-05-31
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Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Gomer E Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:46
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/97; F02K9/972; F02K9/08; F02K9/10; F02K9/12; F02K9/974; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/202; F05D2260/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A COOLED ROCKET ENGINE EXHAUST NOZZLE COMPRISING: AN ANNULAR HEAT RESISTANT CELLULAR STRUCTURE DEFINING THE CONTOURS OF SAID NOZZLE SAID STRUCTURE HAVING INTERNAL WALLS DEFINING RADIALLY EXTENDING, PERIPHERALLY SPACED CELLS OPEN ONLY AT THEIR RADIALLY INNER ENDS; A PLURALITY OF SLOW BURNING RATE, SOLID PROPELLANT UNITS DISPOSED WITHIN SAID CELLS AND EXPOSED AT SAID INNER ENDS TO THE EXHAUST GAS FLOW THROUGH SAID EXHAUST NOZZLE, SAID SOLID PROPELLANT UNITS BEING INGINTABLE AT A LOW TEMPERATURE BY SAID HOT ROCKET ENGINE EXHAUST GASES PASSING THROUGH SAID EXHAUST NOZZLE AND BURNING AT LOW TEMPERATURE RELATIVE TO SAID EXHAUST GASES TO PROVIDE A STREAM OF COOL GASES THROUGH SAID
Claim 2
Dependent Claim
106 words
A COOLED ROCKET ENGINE EXHAUST NOZZLE COMPRISING: AN ANNULAR HEAT RESISTANT CELLULAR STRUCTURE DEFINING THE CONTOURS OF SAID NOZZLE SAID STRUCTURE HAVING INTERNAL WALLS DEFINING RADIALLY EXTENDING, PERIPHERALLY SPACED CELLS OPEN ONLY AT THEIR RADIALLY INNER ENDS; A PLURALITY OF SLOW BURNING RATE, SOLID PROPELLANT UNITS DISPOSED WITHIN SAID CELLS AND EXPOSED AT SAID INNER ENDS TO THE EXHAUST GAS FLOW THROUGH SAID EXHAUST NOZZLE, SAID SOLID PROPELLANT UNITS BEING INGINTABLE AT A LOW TEMPERATURE BY SAID HOT ROCKET ENGINE EXHAUST GASES PASSING THROUGH SAID EXHAUST NOZZLE AND BURNING AT LOW TEMPERATURE RELATIVE TO SAID EXHAUST GASES TO PROVIDE A STREAM OF COOL GASES THROUGH SAID
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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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |