US2551409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling machine
Assignee: Ingersoll Rand Co
•
Filing: 1946-07-09
•
Granted: 1951-05-01
•
Expires: 1966-07-09
Abstract
No abstract record available.
Inventors
- 👤 James H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/081; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18608; Y10T74/19; Y10T74/19023; Y10T74/19037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1847693A
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US2030636A
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US2096070A
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US2083194A
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US2104608A
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US2127738A
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US2228098A
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US2242739A
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US2283842A
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US2372748A
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US2375991A
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US2331179A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |