US2435548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum pump
Assignee: SCOPHONY Corp
•
Filing: 1943-11-05
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Granted: 1948-02-03
•
Expires: 1963-11-05
Abstract
No abstract record available.
Inventors
- 👤 Adolph H Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
F; F04; F04B; F04B37/00; F04B37/10; F04B37/14; F04B35/00; F04B35/04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/465
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) | 1951-02-02 | 1951-08-04 | 1952-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-02 | 1955-08-04 | 1956-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-02 | 1959-08-04 | 1960-02-03 | $7700.00 | Window Closed / Lapsed |