US2215798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum vessel
Assignee: Dr Erich F Huth GmbH
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Filing: 1937-11-05
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Granted: 1940-09-24
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Expires: 1957-11-05
Abstract
No abstract record available.
Inventors
- 👤 Schedel Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:39
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/025; C04B37/003; C04B37/005; C04B37/04; C04B37/042; C04B37/045; H; H01; H01J; H01J5/00; H01J5/20; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/40; C04B2237/50; C04B2237/82; H01J2893/00; H01J2893/0033; H01J2893/0037
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) | 1943-09-24 | 1944-03-25 | 1944-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-24 | 1948-03-25 | 1948-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-24 | 1952-03-25 | 1952-09-24 | $7700.00 | Window Closed / Lapsed |