US2695158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fracture type rock cutter
Assignee: Individual
•
Filing: 1949-11-30
•
Granted: 1954-11-23
•
Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Hawthorne
- 👤 Earl M Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:39
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/42; E21B10/62; E21B10/627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1428122A
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US1733241A
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US1486898A
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US1514415A
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US1809182A
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US1809351A
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US1899771A
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GB449974A
Cited
GB606377A
Cited
US2498251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |