Patent US2490375A successfully refreshed from Google Patents.
US2490375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic bore gauging head
Assignee: MERZ ENGINEERING Co
•
Filing: 1946-08-29
•
Granted: 1949-12-06
•
Expires: 1966-08-29
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Rupley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:56
CPC Classifications
G; G01; G01B; G01B13/00; G01B13/08; G01B13/10; Y; Y10; Y10S; Y10S33/00; Y10S33/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1437053A
Cited
US1972124A
Cited
US2074753A
Cited
US2139282A
Cited
US2239981A
Cited
US2241287A
Cited
US2322343A
Cited
US2306469A
Cited
US2375600A
Cited
US2369319A
Cited
US2385157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |