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Patent US2943446A successfully refreshed from Google Patents.
US2943446A
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US
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Means sensitive to changes in the effective restriction of a restrictive element in a flow conduit
Assignee: Rolls Royce PLC
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Filing: 1956-10-04
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Granted: 1960-07-05
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Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Goodall Donald George
- 👤 Chicken John Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; B64; B64D; B64D37/00; B64D37/02; B64D37/14; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1874707A
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US2090069A
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US2406181A
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US2451280A
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US2647366A
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US2545815A
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US2670082A
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US2729339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |