Patent US1766989A successfully refreshed from Google Patents.
Patent US3706511A successfully refreshed from Google Patents.
US3706511A
Expired / Lapsed
US
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Laminated plastic propeller
Assignee: United States Atomic Energy Commission
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Filing: 1971-04-06
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Granted: 1972-12-19
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Expires: 1991-04-06
Abstract
Abstract An improved corrosive- and abrasive-resistant mixer propeller for thorium fluoride and zinc fluoride in the production of thorium metal. The propeller is preferably constructed from laminated plastic components.
Inventors
- 👤 Augustus E Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:57
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/051; C; C01; C01B; C01B9/00; C01B9/08; B01F27/053
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
The propeller assembly set forth in claim 1, and further including at least two additional apertured plastic hub members witH blade members and constructed in the same manner as the first mentioned eight hub members and being adapted to rest directly upon said topmost hub member, and one of said additional hub members being bonded to said insert, said additional hub member having their blade members resting directly above the blade members of said topmost hub member, and said blade members of each of said additional hub members having respective and progressively shorter lengths than the length of said blade members of said first mentioned eight hub members, said propeller assembly having a diameter of at least 12 inches.
Claim 2
Dependent Claim
24 words
The propeller assembly set forth in claim 2, wherein said equal pitch for each of said groups of bonded blade members is about 26*.
Claim 3
Dependent Claim
38 words
The propeller assembly set forth in claim 3, wherein said insert is provided with an axially centered, elongated bore hole which is adapted to frictionally receive a turning shaft for effecting a desired rotation of said propeller assembly.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |