Patent US3053439A successfully refreshed from Google Patents.
US3053439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vacuum pump
Assignee: Balzers und Leybold Deutschland Holding AG
•
Filing: 1958-07-23
•
Granted: 1962-09-11
•
Expires: 1978-07-23
Abstract
No abstract record available.
Inventors
- 👤 Brill Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:01
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/12; F04C29/124; F04C29/126; F04C27/00; F04C27/02; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/148; F16K2200/00; F16K2200/40; Y; Y10; Y10S; Y10S418/00; Y10S418/01; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7842; Y10T137/7847; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7891; Y10T137/7892
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR441199A
Cited
US764877A
Cited
US940385A
Cited
US956789A
Cited
US1112233A
Cited
US1539617A
Cited
US1870219A
Cited
US2191345A
Cited
US2337849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |