US2564738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a vacuum-tight bond between ceramics and metals
Assignee: Gesellschaft zur Foerderung der Forschung an der Eidgenoessischen Technischen Hochschule
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Filing: 1947-07-02
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Granted: 1951-08-21
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Expires: 1967-07-02
Abstract
No abstract record available.
Inventors
- 👤 Tank Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:37
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/021; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B37/023; C04B37/025; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/6567; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/40; C04B2237/402; C04B2237/403; C04B2237/405; C04B2237/406; C04B2237/407; C04B2237/408; C04B2237/50; C04B2237/52; C04B2237/525; C04B2237/54; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
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) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |