Patent US2729104A successfully refreshed from Google Patents.
US2729104A
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Pressure indicating and recording machines for internal combustion engines
Assignee: CHARLES D HIRST
•
Filing: 1948-12-20
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Granted: 1956-01-03
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Expires: 1968-12-20
Abstract
No abstract record available.
Inventors
- 👤 Wayne L Shuck
- 👤 William J Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:53
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/08; G01L7/084; G01L23/00; G01L23/26; G01L23/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228479A
Cited
US409087A
Cited
US484411A
Cited
US1060761A
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US1136648A
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US1181037A
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US1154438A
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US1256858A
Cited
US1961170A
Cited
US2196909A
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US2251632A
Cited
US2393960A
Cited
US2440647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |