Patent US2586436A successfully refreshed from Google Patents.
US2586436A
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US
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Wide angle oblique projection system
Assignee: Individual
•
Filing: 1950-07-14
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Granted: 1952-02-19
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Expires: 1970-07-14
Abstract
No abstract record available.
Inventors
- 👤 Planer Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:57
CPC Classifications
G; G02; G02B; G02B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1955850A
Cited
US1881355A
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US1863099A
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US1996054A
Cited
US2215271A
Cited
US2313460A
Cited
US2502544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |