US2809525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-orienting immersion instruments
Assignee: Individual
•
Filing: 1951-07-18
•
Granted: 1957-10-15
•
Expires: 1971-07-18
Abstract
No abstract record available.
Inventors
- 👤 Savage Merle Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/10; G01N9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE40991C
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US1491487A
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US1595801A
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US2192148A
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US2260396A
Cited
GB539394A
Cited
US2520911A
Cited
US2554374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |