US2994974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep trench excavator
Assignee: Individual
•
Filing: 1958-03-06
•
Granted: 1961-08-08
•
Expires: 1978-03-06
Abstract
No abstract record available.
Inventors
- 👤 Domenighetti Costante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:19
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/06; E02D; E02D17/00; E02D17/06; E02F5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US536340A
Cited
US919595A
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US975665A
Cited
US1164072A
Cited
US1234716A
Cited
US1329523A
Cited
US1343081A
Cited
US1630231A
Cited
GB428398A
Cited
US2360334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |