US3450472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled area projector
Assignee: United States Department of the Army
•
Filing: 1966-08-11
•
Granted: 1969-06-17
•
Expires: 1986-08-11
Abstract
No abstract record available.
Inventors
- 👤 Donald E Warden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/20; G01C21/22; G03; G03B; G03B21/00; G03B21/001; G03B23/00; G03B23/08; G03B23/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2260551A
Cited
DE747790C
Cited
US2534561A
Cited
US3122075A
Cited
FR1231770A
Cited
US3238841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |