US3477466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator fluid control valve mechanism
Assignee: LEWIS D STURM
•
Filing: 1967-04-03
•
Granted: 1969-11-11
•
Expires: 1987-04-03
Abstract
No abstract record available.
Inventors
- 👤 Lewis D Sturm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/38; F16K31/383; F16K11/00; F16K11/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87499; Y10T137/87507; Y10T137/87555; Y10T137/87563
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US281579A
Cited
US2735644A
Cited
US2130611A
Cited
US2197320A
Cited
US2212486A
Cited
US2445887A
Cited
US2409517A
Cited
DE881594C
Cited
US2784738A
Cited
US3216444A
Cited
US3351316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |