US2803161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface roughness measuring method and device
Assignee: General Electric Co
•
Filing: 1952-10-02
•
Granted: 1957-08-20
•
Expires: 1972-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry R Summerhayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:19
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30; G01B11/303
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1810739A
Cited
US1991599A
Cited
US2246501A
Cited
US2208882A
Cited
US2241743A
Cited
US2502503A
Cited
US2604809A
Cited
US2561197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |