Patent US2830491A successfully refreshed from Google Patents.
US2830491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic ortho projector
Assignee: Individual
•
Filing: 1953-12-29
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Granted: 1958-04-15
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Expires: 1973-12-29
Abstract
No abstract record available.
Inventors
- 👤 Domeshek Sol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
G; G01; G01C; G01C11/00; G01C11/04; G01C11/06; G01C11/12; G01C11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1344896A
Cited
US1844162A
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US1963079A
Cited
US2032397A
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US2309627A
Cited
US2309752A
Cited
US2464793A
Cited
US2549699A
Cited
US2643576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |