US2690291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for vacuum pumping systems
Assignee: American Television Inc
•
Filing: 1951-07-06
•
Granted: 1954-09-28
•
Expires: 1971-07-06
Abstract
No abstract record available.
Inventors
- 👤 Warren G Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/385
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US703120A
Cited
US905973A
Cited
US1347194A
Cited
US1775531A
Cited
US1972986A
Cited
US2147422A
Cited
US2240607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |