US2751010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junk basket
Assignee: Houston Engineers Inc
•
Filing: 1954-11-18
•
Granted: 1956-06-19
•
Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 Gus H Trahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1720700A
Cited
US2040889A
Cited
US2035887A
Cited
US2159249A
Cited
US2606620A
Cited
US2550228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |