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Patent US2953903A successfully refreshed from Google Patents.
US2953903A
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Hydraulic system for operating simultaneously a plurality of power units
Assignee: Thor Power Tool Co
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Filing: 1957-12-23
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Granted: 1960-09-27
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Donald K Skoog
- 👤 Kramer Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:41
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/02; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/452; F16H61/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB184455A
Cited
US2160920A
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US2562881A
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US2462580A
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US2541290A
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US2720803A
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US2796789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |