US2992537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plow for laying and uncovering pipe
Assignee: Gulf Oil Corp
•
Filing: 1958-10-20
•
Granted: 1961-07-18
•
Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Callahan Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:18
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/104; E02F5/003; E02F5/027; E02F5/106; E02F5/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US815163A
Cited
DE705470C
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US1910481A
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US2414994A
Cited
US2528231A
Cited
US2610415A
Cited
US2602300A
Cited
US2748506A
Cited
US2879649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |