Patent US972131A successfully refreshed from Google Patents.
US972131A
Expired / Lapsed
US
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Electrical heater.
Assignee: APPLIANCE AND ELECTRIC DEVICE Co
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Filing: 1909-01-28
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Granted: 1910-10-04
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Expires: 1929-01-28
Abstract
No abstract record available.
Inventors
- 👤 Milton H Shoenberg
- 👤 George T Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:30
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1913-10-03 | 1914-04-04 | 1914-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-10-03 | 1918-04-04 | 1918-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-10-03 | 1922-04-04 | 1922-10-04 | $7700.00 | Window Closed / Lapsed |