US2828137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill supporting carriage
Assignee: Ingersoll Rand Co
•
Filing: 1957-08-21
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Granted: 1958-03-25
•
Expires: 1977-08-21
Abstract
No abstract record available.
Inventors
- 👤 John H Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/06; E; E21; E21B; E21B7/00; E21B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1548391A
Cited
US2064747A
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US2223802A
Cited
US2607609A
Cited
US2607610A
Cited
US2534772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |