Patent US3389537A successfully refreshed from Google Patents.
US3389537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline scrubber
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1966-10-28
•
Granted: 1968-06-25
•
Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Robert E Mcminn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:17
CPC Classifications
B; B01; B01D; B01D50/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2610697A
Cited
US2786543A
Cited
US2783854A
Cited
US2788080A
Cited
US2910136A
Cited
US2870860A
Cited
US2868315A
Cited
US3025928A
Cited
US3192691A
Cited
US3212232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |