US2784740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
stages erg
Assignee: —
•
Filing: —
•
Granted: 1957-03-12
•
Expires: 1974-03-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/18; F16K11/00; F16K11/02; F16K11/022; F16K5/00; F16K5/08; F16K5/14; F16K5/18; F16K5/184; F16K5/187; Y; Y10; Y10S; Y10S251/00; Y10S251/901; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86831; Y10T137/86847
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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |