US3480091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed apparatus for rock drills
Assignee: Ingersoll Rand Co
•
Filing: 1968-03-18
•
Granted: 1969-11-25
•
Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Laszlo Gyongyosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:05
CPC Classifications
E; E21; E21B; E21B44/00; E21B44/02; E21B44/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2776114A
Cited
US2797066A
Cited
US3172264A
Cited
US3170376A
Cited
US3181630A
Cited
US3405522A
Cited
US3350986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |