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Patent US2738173A successfully refreshed from Google Patents.
US2738173A
Expired / Lapsed
US
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Reduction of friction between a fluid and the wall of a conduit through which the fluid is passing
Assignee: Individual
•
Filing: 1952-04-09
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Granted: 1956-03-13
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Expires: 1972-04-09
Abstract
No abstract record available.
Inventors
- 👤 Massa Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:27
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B1/00; B05B1/02; B05B1/04; B05B1/044; B05B1/08; B05B1/083; Y; Y10; Y10S; Y10S366/00; Y10S366/605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923678A
Cited
US2174348A
Cited
US2185540A
Cited
US2512743A
Cited
US2585103A
Cited
US2566984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |