US2826068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Average flow indicating and recording system
Assignee: Panellit Inc
•
Filing: 1954-06-15
•
Granted: 1958-03-11
•
Expires: 1974-06-15
Abstract
No abstract record available.
Inventors
- 👤 Albert F Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1768553A
Cited
US1867870A
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US1911777A
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US2103077A
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US2385772A
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US2552454A
Cited
US2677276A
Cited
GB672893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |