Patent US5923781A successfully refreshed from Google Patents.
Patent US3507045A successfully refreshed from Google Patents.
US3507045A
Expired / Lapsed
US
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Rule with interchangeable scales
Assignee: Individual
•
Filing: 1968-01-11
•
Granted: 1970-04-21
•
Expires: 1988-01-11
Abstract
No abstract record available.
Inventors
- 👤 Francisco Carrero Rives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:45
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/02; G01B3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE495943A
Cited
US149532A
Cited
US1391621A
Cited
GB273443A
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US2182027A
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FR981485A
Cited
DE840206C
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US2491650A
Cited
FR983774A
Cited
DE809967C
Cited
FR980410A
Cited
DE911334C
Cited
US3120058A
Cited
US3273246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |