Patent US2520397A successfully refreshed from Google Patents.
US2520397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spraying apparatus for internally coating pipes
Assignee: Individual
•
Filing: 1946-12-05
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Granted: 1950-08-29
•
Expires: 1966-12-05
Abstract
No abstract record available.
Inventors
- 👤 Marion C Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:03
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/06; B05B13/0627; B05B1/00; B05B1/26; B05B1/262; B05B1/265; B05B7/00; B05B7/02; B05B7/04; B05B7/0416; B05B7/0441; B05B7/0466; B05B7/10; Y; Y10; Y10S; Y10S239/00; Y10S239/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1936247A
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US2052362A
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US2108207A
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US2185570A
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US2228226A
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US2460545A
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US2348714A
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US2428292A
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US2461517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |