Patent US2689087A successfully refreshed from Google Patents.
US2689087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barberis
Assignee: —
•
Filing: —
•
Granted: 1954-09-14
•
Expires: 1971-09-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:47
CPC Classifications
G; G07; G07B; G07B1/00; G07B1/02; G07F; G07F17/00; G07F17/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1077194A
Cited
US1607435A
Cited
US2090612A
Cited
US2335122A
Cited
US857497A
Cited
US899671A
Cited
US1091498A
Cited
US1925735A
Cited
US1908944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |