Patent US3577685A successfully refreshed from Google Patents.
Patent US3633804A successfully refreshed from Google Patents.
Patent US2521966A successfully refreshed from Google Patents.
US2521966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat and valve stem gauging apparatus
Assignee: Individual
•
Filing: 1945-01-11
•
Granted: 1950-09-12
•
Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 Norman F Clayborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:51
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/003; G01B5/0032
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1329456A
Cited
US1611062A
Cited
US1927821A
Cited
US2104234A
Cited
US2105502A
Cited
US2306489A
Cited
US2323508A
Cited
US2357437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |