US3109290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-vacuum trap for diffusion pumps
Assignee: Individual
•
Filing: 1961-06-27
•
Granted: 1963-11-05
•
Expires: 1981-06-27
Abstract
No abstract record available.
Inventors
- 👤 Kolenko Evgeny Andreevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:34
CPC Classifications
H; H10; H10N; H10N10/00; F; F04; F04F; F04F9/00
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |