US2496430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroscope and camera combination
Assignee: Individual
•
Filing: 1947-05-27
•
Granted: 1950-02-07
•
Expires: 1967-05-27
Abstract
No abstract record available.
Inventors
- 👤 Malcolm F Berglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:25
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR744934A
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US572803A
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US1149678A
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US1236265A
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US1258810A
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US1451096A
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US1810302A
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US2001682A
Cited
FR832164A
Cited
US2256133A
Cited
US2343473A
Cited
US2358231A
Cited
US2373815A
Cited
US2404556A
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US2420719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |