US2878569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination level, rule and protractor device
Assignee: Individual
•
Filing: 1956-02-06
•
Granted: 1959-03-24
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Metrulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:33
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01B; G01B3/00; G01B3/02; G01B3/04
Claims Analysis
Total Claims: 0
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |