US2953902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic elevator control system
Assignee: Dover Corp
•
Filing: 1956-08-31
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Granted: 1960-09-27
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Expires: 1976-08-31
Abstract
No abstract record available.
Inventors
- 👤 Duane J Arbogast
- 👤 Lawrence F Jaseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:31
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/34; B66B1/36; B66B1/40; B66B1/405; F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/046; F15B11/048; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20538; F15B2211/255; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30515; F15B2211/315; F15B2211/31523; F15B2211/31529; F15B2211/31552; F15B2211/31558; F15B2211/32; F15B2211/321; F15B2211/325; F15B2211/327; F15B2211/40; F15B2211/405; F15B2211/40576; F15B2211/415; F15B2211/41563; F15B2211/42; F15B2211/421; F15B2211/424; F15B2211/428; F15B2211/45; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7052; F15B2211/755; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617; Y10T137/264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2553045A
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 |