US2920608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible water heating system
Assignee: Individual
•
Filing: 1953-08-04
•
Granted: 1960-01-12
•
Expires: 1973-08-04
Abstract
No abstract record available.
Inventors
- 👤 Orban John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:51
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1892; F22B1/16; F24; F24D; F24D12/00; F24D12/02; F24D3/00; F24D3/02; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0007; F24D2200/00; F24D2200/04; F24D2200/06; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |