US2573380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing cement for vacuum seals
Assignee: EMI Ltd
•
Filing: 1947-06-28
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Granted: 1951-10-30
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Expires: 1967-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ambrose Edmund Jack
- 👤 Mcgill Eric Frederick George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
F; F02; F02B; F02B61/00; F02B61/02; C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046; C03C27/06; C03C27/10; F02B75/00; F02B75/34; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |