US2688249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling block velocity indicator, position indicator, and safety control
Assignee: Warren Automatic Tool Co
•
Filing: 1948-08-13
•
Granted: 1954-09-07
•
Expires: 1968-08-13
Abstract
No abstract record available.
Inventors
- 👤 Lynn W Storm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:10
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US665821A
Cited
US906561A
Cited
GB250922A
Cited
AT125831B
Cited
US1961037A
Cited
US2085135A
Cited
US2096995A
Cited
US2166212A
Cited
US2287819A
Cited
US2265022A
Cited
US2322478A
Cited
US2365014A
Cited
US2288229A
Cited
US2330752A
Cited
US2573640A
Cited
US2565951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |