Patent US2758352A successfully refreshed from Google Patents.
US2758352A
Expired / Lapsed
US
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Pipe lining apparatus
Assignee: Perkins Pipe Linings Inc
•
Filing: 1955-04-19
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Granted: 1956-08-14
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Expires: 1975-04-19
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:49
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1668154A
Cited
US1988329A
Cited
US2185570A
Cited
GB685637A
Cited
US2704873A
Cited
US2711000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |