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Patent US2620673A successfully refreshed from Google Patents.
US2620673A
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Valve operator
Assignee: Beazer East Inc
•
Filing: 1945-08-24
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Granted: 1952-12-09
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Expires: 1965-08-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Whitcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:28
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/10; C21B9/12; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/188; Y10T74/20; Y10T74/20558; Y10T74/20564; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228098A
Cited
US514262A
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US576316A
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US1467721A
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US856603A
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US1819052A
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US1842381A
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US2072531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |