Patent US685522A successfully refreshed from Google Patents.
US685522A
Expired / Lapsed
US
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Packing for drift, gallery, or other openings in mines.
Assignee: John Muirhead & Son
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Filing: 1901-07-01
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Granted: 1901-10-29
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Expires: 1921-07-01
Abstract
No abstract record available.
Inventors
- 👤 John Muirhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:06
CPC Classifications
E; E21; E21D; E21D5/00; E21D5/12
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) | 1904-10-28 | 1905-04-29 | 1905-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-10-28 | 1909-04-29 | 1909-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-10-28 | 1913-04-29 | 1913-10-29 | $7700.00 | Window Closed / Lapsed |