US3172252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessels
Assignee: Boelkow Entwicklungen KG
•
Filing: 1960-12-19
•
Granted: 1965-03-09
•
Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Boek Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COMBUSTION CHAMBER HAVING WALLS MADE OF A PLURALITY OF LAYERS OF RESIN BONDED FIBROUS MATERIAL, AND AN ANNULAR MEMBER HAVING A PORTION DISPOSED BETWEEN LAYERS OF SAID MATERIAL AND A ROUNDED END PORTION, MEANS DEFINING AN ANNULAR FRUSTO-CONICAL GROOVE ADJACENT SAID ROUNDED PORTION AND INWARDLY THEREOF, SAID FIBROUS MATERIAL HAVING FIBERS ORIENTED IN A LONDITUDINAL DIRECTION BEING DIRECTED AROUND SAID ROUNDED PORTION, AND MEANS TO WEDGE SAID MATERIAL IN SAID FRUSTO-CONICAL ANNULAR GROOVE.
Claim 2
Dependent Claim
74 words
A COMBUSTION CHAMBER HAVING WALLS MADE OF A PLURALITY OF LAYERS OF RESIN BONDED FIBROUS MATERIAL, AND AN ANNULAR MEMBER HAVING A PORTION DISPOSED BETWEEN LAYERS OF SAID MATERIAL AND A ROUNDED END PORTION, MEANS DEFINING AN ANNULAR FRUSTO-CONICAL GROOVE ADJACENT SAID ROUNDED PORTION AND INWARDLY THEREOF, SAID FIBROUS MATERIAL HAVING FIBERS ORIENTED IN A LONDITUDINAL DIRECTION BEING DIRECTED AROUND SAID ROUNDED PORTION, AND MEANS TO WEDGE SAID MATERIAL IN SAID FRUSTO-CONICAL ANNULAR GROOVE.
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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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |