US2857036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pusher mechanism
Assignee: AO Smith Corp
•
Filing: 1955-09-12
•
Granted: 1958-10-21
•
Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Leiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:26
CPC Classifications
B; B65; B65G; B65G25/00; B65G25/04; B65G25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1340595A
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US2057131A
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US2234990A
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US2426569A
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US2559460A
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US2725137A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |