US3509723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-powered impact hammer
Assignee: Arrow Manufacturing Co Inc
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Filing: 1968-08-05
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Granted: 1970-05-05
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Russell John Dorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:13
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/966; B; B25; B25D; B25D9/00; B25D9/14; B25D9/145; B28; B28D; B28D1/00; B28D1/26; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |