US2599864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave front modifying wave guide system
Assignee: Individual
•
Filing: 1947-07-31
•
Granted: 1952-06-10
•
Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Robertson-Shersby-Ha Rob Bruce
- 👤 Richard G Garfitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q19/00; H01Q19/06; H01Q19/08; H01Q19/10; H01Q19/12; H01Q19/13
Claims Analysis
Total Claims: 0
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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) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |