US2983477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug valve saddle
Assignee: MB Skinner Co
•
Filing: 1956-04-19
•
Granted: 1961-05-09
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Patterson D Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:34
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; F16L41/06; F16K; F16K3/00; F16K3/28; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US202785A
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US485717A
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US660526A
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US1004845A
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GB191120158A
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US1845002A
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US2044912A
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US2609955A
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US2790652A
Cited
FR1078216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |