US3397402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for determining the listening habits of wave signal receiver users
Assignee: INTOMART INST VOOR TOEGEPAST M
•
Filing: 1966-09-13
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Granted: 1968-08-13
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Expires: 1986-09-13
Abstract
No abstract record available.
Inventors
- 👤 Henry W Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:55
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/29; H04H60/31; C; C07; C07C; C07C233/00; C07C233/01; C07C233/02; H04H20/00; H04H20/28; H04H20/30; H04H20/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2513360A
Cited
US2766374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |