US2403135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slack controller
Assignee: Individual
•
Filing: 1944-08-03
•
Granted: 1946-07-02
•
Expires: 1964-08-03
Abstract
No abstract record available.
Inventors
- 👤 Ward W Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:54
CPC Classifications
B; B61; B61H; B61H15/00; B61H15/0064; B61H15/0071; B61H15/0078; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7084; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20468
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) | 1949-07-01 | 1949-12-31 | 1950-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-01 | 1953-12-31 | 1954-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-01 | 1957-12-31 | 1958-07-02 | $7700.00 | Window Closed / Lapsed |