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Patent US2987959A successfully refreshed from Google Patents.
US2987959A
Expired / Lapsed
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Device for controlling electromagnetic radiation
Assignee: Siemens Schuckertwerke AG
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Filing: 1958-05-23
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Granted: 1961-06-13
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Expires: 1978-05-23
Abstract
No abstract record available.
Inventors
- 👤 Kimmel Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0036; G02F1/01; G02F1/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |