US2220040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear measuring device
Assignee: Shawmut Engineering Co
•
Filing: 1939-02-08
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Granted: 1940-10-29
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Expires: 1959-02-08
Abstract
No abstract record available.
Inventors
- 👤 Edgar F Hathaway
- 👤 Bixby Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:18
CPC Classifications
A; A43; A43D; A43D999/00; G; G01; G01N; G01N3/00; G01N3/56; G01N2203/00; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N33/00; G01N33/36; Y; Y10; Y10S; Y10S29/00; Y10S29/079
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) | 1943-10-29 | 1944-04-29 | 1944-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-29 | 1948-04-29 | 1948-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-29 | 1952-04-29 | 1952-10-29 | $7700.00 | Window Closed / Lapsed |