Patent US2903854A successfully refreshed from Google Patents.
US2903854A
Expired / Lapsed
US
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Door controlling system
Assignee: R V HARTY Co Inc
•
Filing: 1953-04-17
•
Granted: 1959-09-15
•
Expires: 1973-04-17
Abstract
No abstract record available.
Inventors
- 👤 Ralph V Harty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/73; E05F15/75
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |