Patent US2648915A successfully refreshed from Google Patents.
US2648915A
Expired / Lapsed
US
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Graphical recording and indicating apparatus
Assignee: Individual
•
Filing: 1950-08-14
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Granted: 1953-08-18
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Expires: 1970-08-14
Abstract
No abstract record available.
Inventors
- 👤 Dalby Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:21
CPC Classifications
G; G09; G09B; G09B29/00; G06; G06G; G06G1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1966695A
Cited
US2500495A
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US630855A
Cited
FR317960A
Cited
US729839A
Cited
US852758A
Cited
US1019015A
Cited
US1449207A
Cited
GB593130A
Cited
US2503691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |