Patent US2519680A successfully refreshed from Google Patents.
US2519680A
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US
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Pushing machine
Assignee: LEONE O MACUMBER COOPER
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Filing: 1948-03-09
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Granted: 1950-08-22
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Expires: 1968-03-09
Abstract
No abstract record available.
Inventors
- 👤 Macumber Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:36
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/046; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3936; Y10T24/394; Y10T24/3951
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |