US2933008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for contour plotting
Assignee: PHOTOGRAPHIC ANALYSIS Inc
•
Filing: 1955-01-24
•
Granted: 1960-04-19
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 John S Barnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:43
CPC Classifications
G; G01; G01C; G01C11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1699136A
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US1396047A
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FR537740A
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GB266044A
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US2251828A
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US2283226A
Cited
US2417446A
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US2363643A
Cited
US2493543A
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US2626989A
Cited
US2896501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |