Patent US2522171A successfully refreshed from Google Patents.
US2522171A
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Method of repairing old pipe lines
Assignee: EUGENE C FURMAN
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Filing: 1946-08-09
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Granted: 1950-09-12
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Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Furman
- 👤 Robert E Furman
- 👤 Edmund F Heard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:32
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1657; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49746
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US570256A
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US1485512A
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US1652562A
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US1620154A
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US1721838A
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US1866857A
Cited
US1947581A
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US2424878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |