US2764138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussion tools having a reciprocable hammer piston actuated by combustion gases
Assignee: Atlas Copco AB
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Filing: 1954-03-02
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Granted: 1956-09-25
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Expires: 1974-03-02
Abstract
No abstract record available.
Inventors
- 👤 Wahlsten Gosta Ludvig Bertil
- 👤 Nyholm Bengt Viktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
E; E21; E21B; E21B1/00; E21B1/12; E21B1/24; E21B1/30; E21B1/32; E21B1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |