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US2828979A
Expired / Lapsed
US
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Flanged pipes coupled by resilient sealing gasket having venturi-like fluid passage
Assignee: Individual
•
Filing: 1953-01-19
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Granted: 1958-04-01
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Expires: 1973-01-19
Abstract
No abstract record available.
Inventors
- 👤 Sumner D Wiltse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:35
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/107; F16L17/00; F16L25/00; F16L25/0018
Claims Analysis
Total Claims: 0
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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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |