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US3061356A
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Elevator
Assignee: Joy Manufacturing Co
•
Filing: 1959-07-29
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Granted: 1962-10-30
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Expires: 1979-07-29
Abstract
No abstract record available.
Inventors
- 👤 John F Grundmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:58
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1781922A
Cited
US2081591A
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US2237856A
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US2211016A
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US2354217A
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US2356805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |