US3522657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination level,rule and protractor device
Assignee: RAYMOND R METRULIS
•
Filing: 1969-02-19
•
Granted: 1970-08-04
•
Expires: 1989-02-19
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Metrulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:25
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/02; G01B3/04; G01B3/08; G01C; G01C9/00; G01C9/18; G01C9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US409414A
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US447475A
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US981598A
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US1166512A
Cited
US1979567A
Cited
US2878569A
Cited
US2972191A
Cited
US3374545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |