US1443247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signpost
Assignee: Individual
•
Filing: 1920-06-15
•
Granted: 1923-01-23
•
Expires: 1940-06-15
Abstract
No abstract record available.
Inventors
- 👤 Wrightman Charles Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:18
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/658; E01F9/673; E01F9/685
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) | 1926-01-22 | 1926-07-24 | 1927-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-01-22 | 1930-07-24 | 1931-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-01-22 | 1934-07-24 | 1935-01-23 | $7700.00 | Window Closed / Lapsed |