Patent US1773243A successfully refreshed from Google Patents.
US1773243A
Expired / Lapsed
US
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Closure operator
Assignee: Individual
•
Filing: 1927-06-23
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Granted: 1930-08-19
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Expires: 1947-06-23
Abstract
No abstract record available.
Inventors
- 👤 Duncan J Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:45
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/635; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/71; E05Y2201/72; E05Y2201/722; E05Y2201/726
Claims Analysis
Total Claims: 0
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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) | 1933-08-18 | 1934-02-17 | 1934-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-08-18 | 1938-02-17 | 1938-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-08-18 | 1942-02-17 | 1942-08-19 | $7700.00 | Window Closed / Lapsed |