US2939938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infra red cell methods and applications
Assignee: Hupp Corp
•
Filing: 1953-10-30
•
Granted: 1960-06-07
•
Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Ravich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:58
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/14; H10; H10F; H10F30/00; H10F30/10; Y; Y10; Y10S; Y10S62/00; Y10S62/19
Claims Analysis
Total Claims: 0
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US2575756A
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |