US2471009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring or indicating the roughness or undulations of surfaces
Assignee: Taylor Taylor and Hobson Ltd
•
Filing: 1944-08-15
•
Granted: 1949-05-24
•
Expires: 1964-08-15
Abstract
No abstract record available.
Inventors
- 👤 Reason Richard Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:57
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1796155A
Cited
US2240278A
Cited
US2171433A
Cited
US2330801A
Cited
GB539271A
Cited
GB539273A
Cited
US2345022A
Cited
US2335390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |