US2447966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandible fluid actuated pipecleaning apparatus
Assignee: Panhandle Eastern Pipe Line Co
•
Filing: 1947-01-23
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Granted: 1948-08-24
•
Expires: 1967-01-23
Abstract
No abstract record available.
Inventors
- 👤 Dishman K Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:58
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451841A
Cited
US616696A
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US876566A
Cited
FR397980A
Cited
US1842563A
Cited
US2074213A
Cited
US2248742A
Cited
US2258174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |