Patent US2478711A successfully refreshed from Google Patents.
US2478711A
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US
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Pipe coating apparatus
Assignee: PITTSBURGH PIPE CLEANER Co
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Filing: 1947-12-23
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Granted: 1949-08-09
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Expires: 1967-12-23
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Robinson
- 👤 Walter S Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:00
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/006; Y; Y10; Y10S; Y10S118/00; Y10S118/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |