Patent US2554568A successfully refreshed from Google Patents.
US2554568A
Expired / Lapsed
US
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Clay digger
Assignee: Independent Pneumatic Tool Co
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Filing: 1946-07-17
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Granted: 1951-05-29
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Expires: 1966-07-17
Abstract
No abstract record available.
Inventors
- 👤 Hilmer A Gillerstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/24; B25D17/20; B25D17/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US835290A
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US871756A
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US1109782A
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US1084152A
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US1223027A
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US1641357A
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US1889422A
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US2019332A
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US2102576A
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US2201485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |