US3021755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflecting standard with retractable legs
Assignee: MALCOLM MAY
•
Filing: 1959-04-02
•
Granted: 1962-02-20
•
Expires: 1979-04-02
Abstract
No abstract record available.
Inventors
- 👤 Karchenes George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:24
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/688
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US611754A
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US651649A
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US680177A
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US1863756A
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US2487644A
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US2646638A
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US2749147A
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US2781017A
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US2869504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |