Patent US2800875A successfully refreshed from Google Patents.
US2800875A
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US
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Apparatus for internally spraying pipes
Assignee: SILAS MASON Co
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Filing: 1955-01-21
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Granted: 1957-07-30
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Robert B Jewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/06; B05B13/0627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1692028A
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US1840027A
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US2388517A
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US2461517A
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US2520397A
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US2551722A
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US2634703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |