US2621416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder bore contour gauge
Assignee: Perfect Circle Corp
•
Filing: 1947-04-16
•
Granted: 1952-12-16
•
Expires: 1967-04-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Brenneke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:05
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/2476
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US791282A
Cited
GB190506166A
Cited
US1332527A
Cited
CH68847A
Cited
US1206502A
Cited
FR520721A
Cited
US1664535A
Cited
US1870857A
Cited
DE644333C
Cited
GB463361A
Cited
US2123355A
Cited
US2307950A
Cited
US2354870A
Cited
US2357569A
Cited
US2307831A
Cited
US2363587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |