US1835515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jack knife mine post
Assignee: Individual
•
Filing: 1930-04-21
•
Granted: 1931-12-08
•
Expires: 1950-04-21
Abstract
No abstract record available.
Inventors
- 👤 William V O'bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/02; E21D15/06; E21D15/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32081; Y10T403/32254; Y10T403/32262; Y10T403/32271; Y10T403/32319; Y10T403/32409; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459; Y10T403/32549; Y10T403/32557; Y10T403/32581; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7084
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) | 1934-12-07 | 1935-06-08 | 1935-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-07 | 1939-06-08 | 1939-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-07 | 1943-06-08 | 1943-12-08 | $7700.00 | Window Closed / Lapsed |