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US3527479A
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US
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Leakage interceptor for flanged pipe to housing couplings
Assignee: ROY A MATTHIESSEN
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Filing: 1969-04-03
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Granted: 1970-09-08
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Expires: 1989-04-03
Abstract
No abstract record available.
Inventors
- 👤 Roy A Matthiessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:56
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US798649A
Cited
US2736577A
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US2699960A
Cited
US2671261A
Cited
US3113790A
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US3319980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |