US1655734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ijnttfd statfs -patfnt
Assignee: —
•
Filing: —
•
Granted: 1928-01-10
•
Expires: 1945-01-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/12; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3969; Y10T24/3978; Y10T279/00; Y10T279/17; Y10T279/17564; Y10T279/17598; Y10T279/19; Y10T279/1913; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7056; Y10T403/7058
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) | 1931-01-09 | 1931-07-11 | 1932-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-09 | 1935-07-11 | 1936-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-09 | 1939-07-11 | 1940-01-10 | $7700.00 | Window Closed / Lapsed |