US2787943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock breakers
Assignee: Individual
•
Filing: 1954-04-07
•
Granted: 1957-04-09
•
Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 James E Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:09
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/78; E02F3/783; A; A01; A01B; A01B77/00; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4572; Y10T29/4583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675748A
Cited
US1893871A
Cited
US2211262A
Cited
US2357374A
Cited
US2273120A
Cited
US2473770A
Cited
US2681607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |