Patent US2904320A successfully refreshed from Google Patents.
US2904320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic hammer concrete router and scarifier
Assignee: Individual
•
Filing: 1958-07-29
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Granted: 1959-09-15
•
Expires: 1978-07-29
Abstract
No abstract record available.
Inventors
- 👤 Maurice B Salisbury
- 👤 Lorin L Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:29
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E01C23/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1084810A
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US1242111A
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US1495735A
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US1383542A
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US1535411A
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US1898369A
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US2423787A
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US2436647A
Cited
US2659583A
Cited
US2777680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |