US1524401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and machine for making heat exchangers
Assignee: AUTOMATIC REFRIGERATING Co
•
Filing: 1923-11-22
•
Granted: 1925-01-27
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Expires: 1943-11-22
Abstract
No abstract record available.
Inventors
- 👤 Lundgaard Ivar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:44
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49359; Y10T29/49789; Y10T29/49798; Y10T29/51; Y10T29/5136; Y10T29/5137; Y10T29/5143; Y10T29/5145; Y10T29/5188; Y10T29/53; Y10T29/53113
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) | 1928-01-27 | 1928-07-28 | 1929-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-27 | 1932-07-28 | 1933-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-27 | 1936-07-28 | 1937-01-27 | $7700.00 | Window Closed / Lapsed |