US2835219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line marker
Assignee: Individual
•
Filing: 1957-01-07
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Granted: 1958-05-20
•
Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Back James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/604; E01F9/612
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2610422A
Cited
US2790410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |