US2862667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Geo D Roper Corp
•
Filing: 1954-10-25
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Granted: 1958-12-02
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Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Earl D Hillebrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:23
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/12; F24C3/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US947914A
Cited
US2079504A
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US2123829A
Cited
US2153886A
Cited
US2500061A
Cited
US2487946A
Cited
US2456864A
Cited
US2534097A
Cited
US2699487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |