Patent US3524510A successfully refreshed from Google Patents.
US3524510A
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US
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Grave digging and filling apparatus and method
Assignee: ANDREW O CONNELL
•
Filing: 1967-11-09
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Granted: 1970-08-18
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Expires: 1987-11-09
Abstract
No abstract record available.
Inventors
- 👤 Andrew O Connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:07
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/18; E02F5/00; E02F5/02; E02F5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US684762A
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US1140461A
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US2197989A
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US2624129A
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US2561343A
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US2632617A
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US2782534A
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US3015175A
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US3203188A
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US3309875A
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US3296716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |