US2851799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gauge for determining vertical heights and depths
Assignee: Individual
•
Filing: 1956-04-13
•
Granted: 1958-09-16
•
Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Meents John
- 👤 Carl J Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/26; E21; E21B; E21B47/00; E21B47/04; Y; Y10; Y10S; Y10S37/00; Y10S37/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US246718A
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US723040A
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US1099385A
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US1290875A
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US1369235A
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US2043413A
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US2557021A
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US2694195A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |