US2497853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for projecting circular markings upon nonplanar surfaces
Assignee: Chicago Bridge and Iron Co
•
Filing: 1944-06-12
•
Granted: 1950-02-21
•
Expires: 1964-06-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Arnold
- 👤 William C Piggott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:55
CPC Classifications
B; B25; B25H; B25H7/00; B25H7/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |