US1279929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve-gear for rock-drilling.
Assignee: Individual
•
Filing: 1915-05-01
•
Granted: 1918-09-24
•
Expires: 1935-05-01
Abstract
No abstract record available.
Inventors
- 👤 William Charles Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:57
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/14; B25D9/16; F; F15; F15B; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505
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) | 1921-09-23 | 1922-03-25 | 1922-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-09-23 | 1926-03-25 | 1926-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-09-23 | 1930-03-25 | 1930-09-24 | $7700.00 | Window Closed / Lapsed |