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US692393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed-air drill.
Assignee: S A French
•
Filing: 1901-01-05
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Granted: 1902-02-04
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Expires: 1921-01-05
Abstract
No abstract record available.
Inventors
- 👤 Fred Welmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:15
CPC Classifications
F; F01; F01L; F01L15/00; F01L15/08; F04; F04B; F04B47/00; F04B47/02; F04B47/04
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) | 1905-02-03 | 1905-08-05 | 1906-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-02-03 | 1909-08-05 | 1910-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-02-03 | 1913-08-05 | 1914-02-04 | $7700.00 | Window Closed / Lapsed |