US3490045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse modulation transmission system with reduced quantizing noise during abrupt input level transitions
Assignee: US Philips Corp
•
Filing: 1966-08-31
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Granted: 1970-01-13
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Eeltje De Boer
- 👤 Johan Cornelis Balder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:51
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/06; H04B14/062; H04B14/064; H03; H03M; H03M3/00; H03M3/02; H03M3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2816267A
Cited
US3249870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |