Patent US3199209A successfully refreshed from Google Patents.
US3199209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for leveling and setting to grade elevations, floor duct boxes and the like
Assignee: Individual
•
Filing: 1962-03-19
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Granted: 1965-08-10
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph J W Bergquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:18
CPC Classifications
G; G01; G01C; G01C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1071430A
Cited
FR470993A
Cited
US1853558A
Cited
US1898367A
Cited
US2169533A
Cited
US2627665A
Cited
US2843347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |