US2977797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring the glass level in glass melting ovens
Assignee: Individual
•
Filing: 1956-08-15
•
Granted: 1961-04-04
•
Expires: 1976-08-15
Abstract
No abstract record available.
Inventors
- 👤 Hoffmann Karl-Heinz
- 👤 Becker Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:08
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/241
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1941897A
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US1961893A
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US2213961A
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US2585607A
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US2485579A
Cited
US2692368A
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US2710541A
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DE842554C
Cited
US2824449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |