Patent US2996803A successfully refreshed from Google Patents.
US2996803A
Expired / Lapsed
US
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Mathematical instrument
Assignee: Individual
•
Filing: 1958-10-31
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Granted: 1961-08-22
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Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
- 👤 Saltz Fred
- 👤 Jr Henry J Lombard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:24
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/16; G01B3/166; G01B5/00; G01B5/26; G06; G06G; G06G1/00; G06G1/0005; G06G3/00; G06G3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US37002A
Cited
FR386120A
Cited
US889225A
Cited
FR425048A
Cited
US1142423A
Cited
FR523029A
Cited
US2108251A
Cited
US2209250A
Cited
DE868790C
Cited
US2863220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |