Patent US3374947A successfully refreshed from Google Patents.
US3374947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide rule
Assignee: Individual
•
Filing: 1966-05-13
•
Granted: 1968-03-26
•
Expires: 1986-05-13
Abstract
No abstract record available.
Inventors
- 👤 Wern Carl Rune
- 👤 Wern George Herman
- 👤 Wern Lars Ake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/02; G06G1/10; G06G1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US768971A
Cited
US1042755A
Cited
US1918188A
Cited
US2394563A
Cited
US2426362A
Cited
US2468582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |