US2697828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector for electromagnetic waves
Assignee: Standard Oil Development Co
•
Filing: 1949-12-29
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Granted: 1954-12-21
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Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Karl O Heintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:44
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/18; H01Q1/00; H01Q1/12; H01Q1/1207; H01Q1/1228; Y; Y10; Y10S; Y10S343/00; Y10S343/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362557A
Cited
US1315595A
Cited
FR365643A
Cited
US1384014A
Cited
US2151336A
Cited
US2212110A
Cited
US2472212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |