Patent US2999701A successfully refreshed from Google Patents.
US2999701A
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Pipe coupling having sealing and anchoring means
Assignee: Chicago Forging and Manufacturing Co
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Filing: 1959-04-08
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Granted: 1961-09-12
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Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 David R Blair
- 👤 Dibrell P Hynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:28
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/091; F16L19/00; F16L19/08; F16L19/083; F16L19/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US493883A
Cited
US770525A
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GB551006A
Cited
US2448888A
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US2547394A
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US2672187A
Cited
US2837351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |