Patent US2849860A successfully refreshed from Google Patents.
US2849860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket motor with recrystallized silicon carbide throat insert
Assignee: Saint Gobain Abrasives Inc
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Filing: 1955-10-17
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Granted: 1958-09-02
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/97; F02K9/974; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A ROCKET MOTOR COMPRISING A HOLLOW CHAMBER MADE OF GRAPHITE HAVING A PORTION OF A VENTURI AS AN INTEGRAL PART THEREOF, AN EXHAUST NOZZLE PIECE SEPARATE FROM SAID CHAMBER AND ALSO MADE OF GRAPHITE AND CONSTITUTING A CONTINUATION OF SAID VENTURI, A THROAT INSERT MADE OF RECRYSTALLIZED SILICON CARBIDE IN THE NARROWEST PART OF SAID VENTURI, A COATING OF SILICON CARBIDE ON THE INSIDE OF SAID CHAMBER AND ON THE INSIDE OF THE SAID PORTION OF A VENTURI BEING A CONTINUOUS COATING AND BEING INTEGRAL WITH THE GRAPHITE OF SAID CHAMBER AND OF SAID PORTION OF A VENTURI, A COATING OF SILICON CARBIDE ON THE INSIDE OF SAID EXHAUST NOZZLE PIECE AND BEING INTEGRAL WITH THE GRAPHITE THEREOF, AND A CONTINUOUS OUTSIDE COATING OF SILICON CARBIDE ON THE OUTSIDE OF THE CHAMBER AND THE PORTION OF A VENTURI AND THE EXHAUST NOZZLE PIECE AND INTEGRAL WITH THE GRAPHITE OF SAID CHAMBER AND OF SAID PORTION OF A VENTURI AND OF SAID EXHAUST NOZZLE PIECE.
Claim 2
Dependent Claim
164 words
A ROCKET MOTOR COMPRISING A HOLLOW CHAMBER MADE OF GRAPHITE HAVING A PORTION OF A VENTURI AS AN INTEGRAL PART THEREOF, AN EXHAUST NOZZLE PIECE SEPARATE FROM SAID CHAMBER AND ALSO MADE OF GRAPHITE AND CONSTITUTING A CONTINUATION OF SAID VENTURI, A THROAT INSERT MADE OF RECRYSTALLIZED SILICON CARBIDE IN THE NARROWEST PART OF SAID VENTURI, A COATING OF SILICON CARBIDE ON THE INSIDE OF SAID CHAMBER AND ON THE INSIDE OF THE SAID PORTION OF A VENTURI BEING A CONTINUOUS COATING AND BEING INTEGRAL WITH THE GRAPHITE OF SAID CHAMBER AND OF SAID PORTION OF A VENTURI, A COATING OF SILICON CARBIDE ON THE INSIDE OF SAID EXHAUST NOZZLE PIECE AND BEING INTEGRAL WITH THE GRAPHITE THEREOF, AND A CONTINUOUS OUTSIDE COATING OF SILICON CARBIDE ON THE OUTSIDE OF THE CHAMBER AND THE PORTION OF A VENTURI AND THE EXHAUST NOZZLE PIECE AND INTEGRAL WITH THE GRAPHITE OF SAID CHAMBER AND OF SAID PORTION OF A VENTURI AND OF SAID EXHAUST NOZZLE PIECE.
References Cited (Backward Citations)
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Cited
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Cited
US2614619A
Cited
FR1009482A
Cited
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US2658332A
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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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |