Patent US3333570A successfully refreshed from Google Patents.
US3000261A
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US
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Golf trainer having optical viewing means
Assignee: Individual
•
Filing: 1957-01-17
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Granted: 1961-09-19
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Expires: 1977-01-17
Abstract
No abstract record available.
Inventors
- 👤 Frenkel Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:01
CPC Classifications
A; A63; A63B; A63B24/00; A63B24/0003; A63B69/00; A63B69/36; G; G02; G02B; G02B23/00; A63B2225/00; A63B2225/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191502484A
Cited
US1327171A
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US1410811A
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GB223044A
Cited
US1973665A
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US2293271A
Cited
US2411704A
Cited
US2545675A
Cited
US2808757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |