US3387772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vacuum pump
Assignee: Balzers und Leybold Deutschland Holding AG
•
Filing: 1966-02-01
•
Granted: 1968-06-11
•
Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Wutz Maximilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:43
CPC Classifications
F; F04; F04C; F04C27/00; F04C27/02; F02; F02B; F02B53/00; F04C18/00; F04C18/22; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1340625A
Cited
US1686569A
Cited
US1968113A
Cited
GB557902A
Cited
GB583035A
Cited
US2988065A
Cited
US3077867A
Cited
US3117561A
Cited
US3276676A
Cited
US3226013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |