Patent US2770884A successfully refreshed from Google Patents.
US2779237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
smith
Assignee: —
•
Filing: —
•
Granted: 1957-01-29
•
Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:44
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; E; E04; E04H; E04H3/00; E04H3/10; E04H3/22; G03B37/00; G03B37/04; G09; G09F; G09F19/00; G09F19/12; G09F19/18; G09F19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1666304A
Cited
US2373013A
Cited
AT93077B
Cited
AT99122B
Cited
US1887650A
Cited
US2031361A
Cited
US1931668A
Cited
US1940148A
Cited
US2045093A
Cited
US2041194A
Cited
US2041195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |