Patent US3463518A successfully refreshed from Google Patents.
US3463518A
Expired / Lapsed
US
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Sealed pipe coupling
Assignee: Shell USA Inc
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Filing: 1967-08-22
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Granted: 1969-08-26
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Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Douglas E Broussard
- 👤 Dean P Hemphill
- 👤 Thomas J Bolling Jr
- 👤 Thomas R Beasley
- 👤 Erskine E Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:34
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/003; F16L15/04; F16L23/00; F16L23/16; F16L23/18; F16L23/20
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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |