Patent US1509782A successfully refreshed from Google Patents.
US1509782A
Expired / Lapsed
US
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Feed-water heater
Assignee: General Electric Co
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Filing: 1921-09-19
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Granted: 1924-09-23
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Expires: 1941-09-19
Abstract
No abstract record available.
Inventors
- 👤 Samuelson Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:54
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/32; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/205; Y10S165/215
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) | 1927-09-23 | 1928-03-24 | 1928-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-23 | 1932-03-24 | 1932-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-23 | 1936-03-24 | 1936-09-23 | $7700.00 | Window Closed / Lapsed |