US2918915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis ball projecting machine
Assignee: Individual
•
Filing: 1957-08-26
•
Granted: 1959-12-29
•
Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Doeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:32
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/40; A63B69/406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1204468A
Cited
US1211738A
Cited
US1677810A
Cited
FR909123A
Cited
US2483039A
Cited
US2690169A
Cited
US2705945A
Cited
US2729206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |