Patent US2788768A successfully refreshed from Google Patents.
US2788768A
Expired / Lapsed
US
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Distributing valve arrangement for chipping hammer
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1954-05-12
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Granted: 1957-04-16
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Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Howard R Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:28
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/14
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |