Patent US2938562A successfully refreshed from Google Patents.
US2938562A
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Structure for lining tubular members
Assignee: Vetco Gray LLC
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Filing: 1957-12-24
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Granted: 1960-05-31
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Expires: 1977-12-24
Abstract
No abstract record available.
Inventors
- 👤 John D Watts
- 👤 Elwood K Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:38
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/006; F16L15/008; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/154; B21D; B21D26/00; B21D26/02; B21D26/033; B21D26/043; B21D26/045; Y; Y10; Y10S; Y10S285/00; Y10S285/917; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/4981; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994; Y10T29/53; Y10T29/53652; Y10T29/53796; Y10T29/5383
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US952545A
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US942184A
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US1741217A
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US2038304A
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US2228139A
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US2610651A
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US2631640A
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US2810592A
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US2850796A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |