US3528499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic floating drill pipe and sucker rod protector
Assignee: Individual
•
Filing: 1969-03-25
•
Granted: 1970-09-15
•
Expires: 1989-03-25
Abstract
No abstract record available.
Inventors
- 👤 Charles H Collett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:16
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; E21B17/105
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3058524A
Cited
US3019063A
Cited
US3197262A
Cited
US3227498A
Cited
US3330359A
Cited
US3414337A
Cited
US3425757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |