US3449757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording of a variable slope pulse modulated signal
Assignee: Raytheon Co
•
Filing: 1966-03-07
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Granted: 1969-06-10
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Expires: 1986-03-07
Abstract
No abstract record available.
Inventors
- 👤 Russell R Law
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:34
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2419547A
Cited
US2515452A
Cited
GB657398A
Cited
US2563882A
Cited
US2867685A
Cited
US2816175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |