US2826253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore wall cleaner
Assignee: Individual
•
Filing: 1954-06-04
•
Granted: 1958-03-11
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Marion F Wright
- 👤 Marvin K Swofford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1302940A
Cited
FR540910A
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US2200758A
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US2237863A
Cited
US2325556A
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US2369222A
Cited
US2433955A
Cited
US2421434A
Cited
US2506405A
Cited
US2583044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |