US3493043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono guide line apparatus and method
Assignee: Hughes Tool Co
•
Filing: 1967-08-09
•
Granted: 1970-02-03
•
Expires: 1987-08-09
Abstract
No abstract record available.
Inventors
- 👤 Bruce J Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:22
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3012610A
Cited
US2984308A
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US2981347A
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US3062287A
Cited
US3166123A
Cited
US3191695A
Cited
US3302709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |