Patent US2795273A successfully refreshed from Google Patents.
US2589720A
Expired / Lapsed
US
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Electronic device
Assignee: Graflex Inc
•
Filing: 1950-10-18
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Granted: 1952-03-18
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Expires: 1970-10-18
Abstract
No abstract record available.
Inventors
- 👤 Mcmath Marl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; F; F21; F21K; F21K5/00; F21K5/02; F21K5/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1939332A
Cited
US2071370A
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US2290264A
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US2285849A
Cited
US2285006A
Cited
US2395600A
Cited
US2409967A
Cited
US2390877A
Cited
US2576934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |