Patent US436558A successfully refreshed from Google Patents.
US436558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-drill
Assignee: —
•
Filing: —
•
Granted: 1890-09-16
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Expires: 1907-09-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:26
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/24; C; C10; C10M; C10M2201/00; C10M2201/04; C10M2201/041; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17085; Y10T279/17931
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) | 1893-09-15 | 1894-03-17 | 1894-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-09-15 | 1898-03-17 | 1898-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-09-16 | 1902-03-18 | 1902-09-17 | $7700.00 | Window Closed / Lapsed |