US3547222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill feed mast with integral muffler and oil separator
Assignee: Studebaker Worthington Inc
•
Filing: 1969-09-02
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Granted: 1970-12-15
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Expires: 1989-09-02
Abstract
No abstract record available.
Inventors
- 👤 Linwood A Pickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:15
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084; B; B25; B25D; B25D17/00; B25D17/11; B25D17/12; Y; Y10; Y10S; Y10S173/00; Y10S173/02
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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |