US2667390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston or like cup-shaped article
Assignee: METALFLO Corp
•
Filing: 1948-06-26
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Granted: 1954-01-26
•
Expires: 1968-06-26
Abstract
No abstract record available.
Inventors
- 👤 Watson Romaine Elden
- 👤 John R Boston
- 👤 Lehmeier Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:15
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1440549A
Cited
GB248720A
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US1774824A
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US1929802A
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US1936598A
Cited
US2096513A
Cited
US2244954A
Cited
US2392925A
Cited
US2465792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |