US3364579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contour or level indicating and recording device
Assignee: Individual
•
Filing: 1965-04-02
•
Granted: 1968-01-23
•
Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Earl H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:10
CPC Classifications
E; E01; E01B; E01B35/00; E01B2203/00; E01B2203/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126640A
Cited
US1285431A
Cited
US2103868A
Cited
US2344216A
Cited
US2672694A
Cited
US2832148A
Cited
US3037294A
Cited
GB924221A
Cited
DE1163203B
Cited
US3222787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |