US2832567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile roof drill
Assignee: JH Fletcher and Co
•
Filing: 1956-02-08
•
Granted: 1958-04-29
•
Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Fletcher James Robert
- 👤 Fletcher William Farwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:07
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/022; E21B19/00; E21B19/08; E21B19/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US874348A
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US2409843A
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US2508835A
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US2659583A
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US2590958A
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US2670931A
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US2648401A
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US2683587A
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US2679437A
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US2634952A
Cited
US2687924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |