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US2588068A
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Drilling apparatus
Assignee: Consolidated Edison Company of New York Inc
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Filing: 1948-01-09
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Granted: 1952-03-04
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Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
- 👤 Williams Ernest
- 👤 John W Bogdanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:08
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/64; E21B10/66; E21B10/26; E21B10/32; E21B10/34; E21B7/00; E21B7/20; Y; Y10; Y10T; Y10T74/00; Y10T74/17; Y10T74/177
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |