Patent US2036298A successfully refreshed from Google Patents.
US661798A
Expired / Lapsed
US
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Apparatus for making and sharpening rock-drills.
Assignee: Individual
•
Filing: 1900-05-22
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Granted: 1900-11-13
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Expires: 1920-05-22
Abstract
No abstract record available.
Inventors
- 👤 Gilbert Glossop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/02; B21K5/06
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) | 1903-11-13 | 1904-05-14 | 1904-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-11-13 | 1908-05-14 | 1908-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-11-13 | 1912-05-14 | 1912-11-13 | $7700.00 | Window Closed / Lapsed |