Patent US3309874A successfully refreshed from Google Patents.
US3309874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ablative nozzle
Assignee: Individual
•
Filing: 1965-02-04
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Granted: 1967-03-21
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Expires: 1985-02-04
Abstract
No abstract record available.
Inventors
- 👤 Bert B Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:34
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/97; F02K9/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A MINATURE ROCKET HAVING AN ELONGATE CASING, A PROPELLANT GRAIN LINING THE INTERIOR OF THE CASING WITH A PERFORATION EXTENDING LENGTHWISE THROUGH THE CENTRAL PORTION OF THE GRAIN, AND A NOZZLE ON THE END OF THE CASING IN AXIAL ALIGNMENT WITH THE PERFORATION, SAID NOZZLE HAVING A RESTRICTED THROAT PORTION WHICH PROVIDES A RESTRICTED PASSAGE IN AXIAL ALIGNMENT WITH THE PERFORATION, SAID THROAT PORTION BEING FORMED OF ABLATIVE MATERIAL WHICH IN CROSSSECTION VARIES IN COMPOSITION FROM THE INSIDE OUT WITH THE MATERIAL MAKING UP THE INNER PORTION ABLATING MORE RAPIDLY THAN THE MATERIAL MAKING UP THE OUTER PORTION AS THE COMBUSTION GASES PASS THROUGH THE NOZZLE WHEREBY THE RATE OF ABLATION DECREASES DURING BURNING OF THE GRAIN.
Claim 2
Dependent Claim
117 words
A MINATURE ROCKET HAVING AN ELONGATE CASING, A PROPELLANT GRAIN LINING THE INTERIOR OF THE CASING WITH A PERFORATION EXTENDING LENGTHWISE THROUGH THE CENTRAL PORTION OF THE GRAIN, AND A NOZZLE ON THE END OF THE CASING IN AXIAL ALIGNMENT WITH THE PERFORATION, SAID NOZZLE HAVING A RESTRICTED THROAT PORTION WHICH PROVIDES A RESTRICTED PASSAGE IN AXIAL ALIGNMENT WITH THE PERFORATION, SAID THROAT PORTION BEING FORMED OF ABLATIVE MATERIAL WHICH IN CROSSSECTION VARIES IN COMPOSITION FROM THE INSIDE OUT WITH THE MATERIAL MAKING UP THE INNER PORTION ABLATING MORE RAPIDLY THAN THE MATERIAL MAKING UP THE OUTER PORTION AS THE COMBUSTION GASES PASS THROUGH THE NOZZLE WHEREBY THE RATE OF ABLATION DECREASES DURING BURNING OF THE GRAIN.
References Cited (Backward Citations)
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Cited
US2206057A
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US2952972A
Cited
US3081705A
Cited
US3135297A
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US3073111A
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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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |