Patent US2895223A successfully refreshed from Google Patents.
US2895223A
Expired / Lapsed
US
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Perspective drafting machine
Assignee: Individual
•
Filing: 1955-04-29
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Granted: 1959-07-21
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Chris J Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:16
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US329392A
Cited
US495157A
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US1591380A
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US2553026A
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US2484361A
Cited
US2495694A
Cited
US2723456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |