US2618014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for recording surface conditions inside tubular elements
Assignee: Individual
•
Filing: 1949-06-30
•
Granted: 1952-11-18
•
Expires: 1969-06-30
Abstract
No abstract record available.
Inventors
- 👤 John W Sawyer
- 👤 Ephriam L Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:07
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803; E; E21; E21B; E21B47/00; E21B47/09; E21B47/098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US672909A
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US689408A
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US1052081A
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US1794199A
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US1986629A
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US2206410A
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US2405245A
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US2327781A
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US2395216A
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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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |