US2448568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for rectifying and projecting aerial photographs
Assignee: Individual
•
Filing: 1941-03-07
•
Granted: 1948-09-07
•
Expires: 1961-03-07
Abstract
No abstract record available.
Inventors
- 👤 Zwillinger Max
- 👤 Samuel G Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:25
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1228685A
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US1692241A
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US1528506A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |