US2810526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportioning on and off controlling system for variables
Assignee: IND CONTROLS Inc
•
Filing: 1952-10-14
•
Granted: 1957-10-22
•
Expires: 1972-10-14
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:00
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/22; G05D23/2236; G05D23/2239
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1976854A
Cited
US1150953A
Cited
US1482791A
Cited
US1541600A
Cited
US1745915A
Cited
US1834416A
Cited
GB372007A
Cited
US2012588A
Cited
US2085855A
Cited
US2148491A
Cited
US2086120A
Cited
US2082607A
Cited
US2220028A
Cited
US2138593A
Cited
US2218464A
Cited
US2276822A
Cited
US2285204A
Cited
US2470556A
Cited
US2595644A
Cited
US2617089A
Cited
US2706764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |