Patent US2711382A successfully refreshed from Google Patents.
US2711382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming and applying metal heat exchange fins
Assignee: General Electric Co
•
Filing: 1951-02-08
•
Granted: 1955-06-21
•
Expires: 1971-02-08
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:24
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; Y; Y10; Y10S; Y10S165/00; Y10S165/905; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1051; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1037754A
Cited
US1200167A
Cited
US1369806A
Cited
US1721808A
Cited
US1679973A
Cited
FR573873A
Cited
US1924472A
Cited
US2035403A
Cited
US2133357A
Cited
US2423869A
Cited
US2423870A
Cited
US2342117A
Cited
US2413179A
Cited
US2532011A
Cited
US2555564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |