US1515593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating rock-drill bits and the like
Assignee: Individual
•
Filing: 1923-01-13
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Granted: 1924-11-18
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Expires: 1943-01-13
Abstract
No abstract record available.
Inventors
- 👤 Elsdon-Dew William
- 👤 Pryce Leslie
- 👤 Woodworth Leon Byron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:44
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105
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) | 1927-11-18 | 1928-05-19 | 1928-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-11-18 | 1932-05-19 | 1932-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-11-18 | 1936-05-19 | 1936-11-18 | $7700.00 | Window Closed / Lapsed |