US2838860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End cover member
Assignee: Proctor and Schwartz Inc
•
Filing: 1957-06-24
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Granted: 1958-06-17
•
Expires: 1977-06-24
Abstract
No abstract record available.
Inventors
- 👤 Finnerty Joseph Norris
- 👤 Jr William F Volkert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:52
CPC Classifications
G; G09; G09F; G09F3/00; G09F3/08; G09F3/18; G09F3/20; G09F7/00; G09F7/02; G09F7/08; G09F7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2353469A
Cited
US2730824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |