US2646590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door controller
Assignee: Individual
•
Filing: 1950-04-03
•
Granted: 1953-07-28
•
Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Robert H Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:29
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1008; Y; Y10; Y10T; Y10T292/00; Y10T292/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US346194A
Cited
US533815A
Cited
US607122A
Cited
GB191325705A
Cited
US1629596A
Cited
GB247008A
Cited
US2093039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |