US3235947A
Expired / Lapsed
US
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Method for making a combustion chamber
Assignee: Bolkow GmbH
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Filing: 1962-01-30
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Granted: 1966-02-22
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Expires: 1982-01-30
Abstract
No abstract record available.
Inventors
- 👤 Sohlemann Just
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; F; F02; F02K; F02K9/00; F02K9/42; F02K9/60; F02K9/62; F02K9/64; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49346; Y10T29/49805
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A METHOD FOR PRODUCING A LIQUID COOLED COMBUSTION CHAMBER USING TUBULAR ELEMENTS COMPRISING THE STEPS IN SUCCESSION OF ARRANGING TWO TUBULAR ELEMENTS TOGETHER IN TELESCOPIC FASHION ONE OVER THE OTHER AND WELDING THE TWO TUBULAR ELEMENTS TOGETHER AT CIRCUMFERENTIALLY SPACED LOCATIONS ALONG THEIR LENGTH SO THAT THE SPACE BETWEEN THE TUBULAR ELEMENTS AND BETWEEN THE CONNECTIONS FORM LONGITUDINALLY EXTENDING COOLING CHANNELS, FORMING A NOZZLE OF THE TUBULAR ELEMENTS BY BENDING THEM ADJACENT THEIR ONE ENDS AND THEREAFTER WIDENING THE CHANNELS BY DIRECTING FLUID THROUGH THE CHANNELS UNDER PRESSURE.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |