US2457616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal foil type strain gauge and method of making same
Assignee: Douglas Aircraft Co Inc
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Filing: 1946-07-16
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Granted: 1948-12-28
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Expires: 1966-07-16
Abstract
No abstract record available.
Inventors
- 👤 William D Van Dyke
- 👤 Paul A Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:37
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2287; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49103; Y10T428/00; Y10T428/12; Y10T428/12188; Y10T428/12194; Y10T428/12361; Y10T428/12431
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |