Patent US3468561A successfully refreshed from Google Patents.
US3468561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flanged joint for high-vacuum systems,particularly large systems
Assignee: Individual
•
Filing: 1968-02-12
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Granted: 1969-09-23
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Expires: 1988-02-12
Abstract
No abstract record available.
Inventors
- 👤 Andrei Vasilievich Balitsky
- 👤 Nikolai Ilich Penkin
- 👤 Lev Alexeevich Filatovsky
- 👤 Nikolai Ivanovich Gavrilov
- 👤 Rostislav Evgenievi Rybchinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:53
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/02; F16L23/032; F16L23/16; F16L23/18; F16L23/20; Y; Y10; Y10S; Y10S277/00; Y10S277/913
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) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |