US2809932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anode for hot water tanks
Assignee: Allen Manufacturing Co
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Filing: 1955-06-21
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Granted: 1957-10-15
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Abt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:26
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/18; F24H9/1809; F24H9/1818; C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |