US1622006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-interchange apparatus
Assignee: ALUMINIUM PLANT AND VESSEL Co Ltd
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Filing: 1924-07-15
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Granted: 1927-03-22
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Expires: 1944-07-15
Abstract
No abstract record available.
Inventors
- 👤 Seligman Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/40; A23B2/42; A23B2/44; C; C12; C12H; C12H1/00; C12H1/12; C12H1/16; C12H1/18; F; F28; F28F; F28F3/00; F28F3/08; F28F3/083
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) | 1930-03-21 | 1930-09-20 | 1931-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-03-21 | 1934-09-20 | 1935-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-03-21 | 1938-09-20 | 1939-03-22 | $7700.00 | Window Closed / Lapsed |