US2437247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specific gravity indicator
Assignee: Individual
•
Filing: 1944-05-15
•
Granted: 1948-03-09
•
Expires: 1964-05-15
Abstract
No abstract record available.
Inventors
- 👤 Fischer Kermit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:14
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/10; G01N9/12; G01N9/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US979516A
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US1424730A
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US1761295A
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US2025774A
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US1701404A
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US2252883A
Cited
US2348733A
Cited
US2333884A
Cited
US2403849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |