Patent US2713487A successfully refreshed from Google Patents.
US2713487A
Expired / Lapsed
US
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Tennis practice device
Assignee: Individual
•
Filing: 1952-09-20
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Granted: 1955-07-19
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Expires: 1972-09-20
Abstract
No abstract record available.
Inventors
- 👤 Jaediker George Alon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:10
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/0073; A63B69/0091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2578313A
Cited
US2656720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |