US2824520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for increasing the pressure or the speed of a fluid flowing within a pipe-line
Assignee: Individual
•
Filing: 1953-11-03
•
Granted: 1958-02-25
•
Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 Henning G Bartels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/042; F04D15/00; F04D15/0027; F04D15/0033; H; H02; H02K; H02K7/00; H02K7/10; H02K7/12; H02K7/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA457581A
Cited
US1290521A
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DE364732C
Cited
US1835284A
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US2005852A
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US2075498A
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US2324650A
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US2382108A
Cited
US2692080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |