Patent US1816491A successfully refreshed from Google Patents.
US1816491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism
Assignee: WETHERILL MORRIS ENGINEERING C
•
Filing: 1928-12-11
•
Granted: 1931-07-28
•
Expires: 1948-12-11
Abstract
No abstract record available.
Inventors
- 👤 Morris Albert Wood
- 👤 Jr Samuel Price Wetherill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:24
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/32; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86911; Y10T137/87096; Y10T137/87113
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-07-27 | 1935-01-26 | 1935-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-27 | 1939-01-26 | 1939-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-27 | 1943-01-26 | 1943-07-28 | $7700.00 | Window Closed / Lapsed |