US2801896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical time marker
Assignee: TNC US Holdings Inc
•
Filing: 1951-07-21
•
Granted: 1957-08-06
•
Expires: 1971-07-21
Abstract
No abstract record available.
Inventors
- 👤 Krahulec Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/35; H04H60/38; H04H60/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1075543A
Cited
US997603A
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US1851835A
Cited
US1933923A
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US2031705A
Cited
GB541079A
Cited
US2660509A
Cited
US2397562A
Cited
US2513360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |