US3013204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing apparatus
Assignee: Shell USA Inc
•
Filing: 1958-06-23
•
Granted: 1961-12-12
•
Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jr John J Ford
- 👤 Jr Chrest B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:55
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB575150A
Cited
US2685216A
Cited
US2749505A
Cited
US2762970A
Cited
US2867784A
Cited
US2843821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |