Patent US1309235A successfully refreshed from Google Patents.
US1309235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Efficiency-recorder
Assignee: —
•
Filing: —
•
Granted: 1919-07-08
•
Expires: 1936-07-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:39
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/08; B67D7/22; B67D7/24; G; G07; G07C; G07C3/00; G07C3/02; G07C3/04; G07C3/045
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) | 1922-07-07 | 1923-01-06 | 1923-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-07-07 | 1927-01-06 | 1927-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-07-07 | 1931-01-06 | 1931-07-08 | $7700.00 | Window Closed / Lapsed |