Patent US2778385A successfully refreshed from Google Patents.
US2778385A
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US
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Apparatus and method for forming sinuous wire structural and heat exchange elements
Assignee: Individual
•
Filing: 1953-03-17
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Granted: 1957-01-22
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Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Gier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:45
CPC Classifications
B; B21; B21F; B21F99/00; B21F1/00; B21F1/04; Y; Y10; Y10S; Y10S264/00; Y10S264/40; Y10T; Y10T29/00; Y10T29/51; Y10T29/5187
Claims Analysis
Total Claims: 0
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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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |