US3222762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming valve seat
Assignee: ACF Industries Inc
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Filing: 1961-09-25
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Granted: 1965-12-14
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Ivan E Nowlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:51
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; F16K1/465; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49409; Y10T29/49826; Y10T29/49908; Y10T29/49938
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
THE METHOD OF FORMING A VALVE COMPRISING THE STEPS OF: MACHINING AN ANNULAR GROOVE IN THE SEAT AND PROVIDING THE CIRCUMFERENTIAL WALLS OF THE GROOVE WITH THREAD SERRATIONS, INSERTING ONE END OF A STRIP OF SEALING MATERIAL OF PREDETERMINED LENGTH INTO THE GROOVE, PROGRESSIVELY INSERTING THE REMAINDER OF THE STRIP INTO THE GROOVE UNTIL THE OTHER END OF THE STRIP ABUTS SAID ONE END OF SAID STRIP FORMING A BUTT JOINT WITH SAID ONE END OF SAID STRIP, APPLYING AND RETAINING SUFFICIENT PRESSURE ON SAID INSERT FOR A SUFFICIENT DURATION TO CAUSE THE SEALING MATERIAL TO FLOW AND FILL THE THREAD SERRATIONS IN THE CIRCUMFERENTIAL WALLS ON THE GROOVE AND TO CAUSE SAID BUTT JOINT TO ESTABLISH A FLUID-TIGHT SEAL, MACHINING OFF THE EXCESSIVE AMOUNT OF SAID INSERT.
References Cited (Backward Citations)
US1891932A
Cited
US1892104A
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US2647556A
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US2728976A
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US3058208A
Cited
US3084423A
Cited
US3087232A
Cited
US3061269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |