US2823026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater assembly for salvaging heat lost with products of combustion
Assignee: Individual
•
Filing: 1956-09-21
•
Granted: 1958-02-11
•
Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Amico Salvatore J D
- 👤 Edward J Molitoris
- 👤 Edwin F Hosey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:22
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0008; Y; Y10; Y10S; Y10S165/00; Y10S165/901
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |