US3196991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mast
Assignee: Individual
•
Filing: 1962-05-04
•
Granted: 1965-07-27
•
Expires: 1982-05-04
Abstract
No abstract record available.
Inventors
- 👤 Richard L Johnson
- 👤 Marion H Schiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1235; E; E04; E04H; E04H12/00; E04H12/18; E04H12/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1652978A
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US2554481A
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US2512150A
Cited
US2708493A
Cited
US2662712A
Cited
US2711918A
Cited
US2791453A
Cited
US2769458A
Cited
US3011750A
Cited
US3104593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |