US1733646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making radiator core structures
Assignee: Individual
•
Filing: 1928-08-03
•
Granted: 1929-10-29
•
Expires: 1948-08-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas N Coffelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49368; Y10T29/49377; Y10T29/49378; Y10T29/4938
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) | 1932-10-28 | 1933-04-29 | 1933-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-28 | 1937-04-29 | 1937-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-28 | 1941-04-29 | 1941-10-29 | $7700.00 | Window Closed / Lapsed |