US2449974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid meter
Assignee: Rockwell Manufacturing Co
•
Filing: 1944-09-29
•
Granted: 1948-09-28
•
Expires: 1964-09-29
Abstract
No abstract record available.
Inventors
- 👤 William V Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:59
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/04; G01F3/06; G01F3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US796067A
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US1024741A
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US1589039A
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US1804036A
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US2207274A
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US2243252A
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US2256937A
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US2315408A
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GB539409A
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US2254698A
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US2389125A
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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) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |