US2144486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locating device
Assignee: Hartford Special Machinery Co
•
Filing: 1936-04-28
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Granted: 1939-01-17
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Expires: 1956-04-28
Abstract
No abstract record available.
Inventors
- 👤 Edmund M Erb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/28; B23Q16/00; B23Q16/02; B23Q16/04; Y; Y10; Y10T; Y10T279/00; Y10T279/13; Y10T409/00; Y10T409/30; Y10T409/308624; Y10T409/30868; Y10T409/308792; Y10T409/308848
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) | 1942-01-16 | 1942-07-18 | 1943-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-16 | 1946-07-18 | 1947-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-16 | 1950-07-18 | 1951-01-17 | $7700.00 | Window Closed / Lapsed |