US3339291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational balance device
Assignee: HARCOURT BRACE AND WORLD Inc
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Filing: 1965-10-15
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Granted: 1967-09-05
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Ruchlis Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:22
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/06; G09B23/08; G09B23/10; G01; G01G; G01G1/00; G01G1/18; G01G19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
AN EDUCATIONAL BALANCE DEVICE FOR DEMONSTRATING THE PRINCIPLE OF THE EQUAL ARM BALANCE COMPRISING A USHAPED SUPPORT MEANS HAVING A PAIR OF UPSTANDING LEGS, A FULCRUM MEANS SUPPORTED IN AND POSITIONED ACROSS SAID UPSTANDING LEGS, A YOKE MEANS SUPPORTED FROM SAID FULCRUM MEANS IN DEPENDING MANNER, AN ELONGATED FLAT BEAM OF SUBSTANTIAL WIDTH SUPPORTED AT THE CENTRAL PORTION THEREOF ON SAID YOKE MEANS, AND PAN MEANS SECURED TO EACH END OF SAID ELONGATED FLAT BEAM.
Claim 2
Dependent Claim
75 words
AN EDUCATIONAL BALANCE DEVICE FOR DEMONSTRATING THE PRINCIPLE OF THE EQUAL ARM BALANCE COMPRISING A USHAPED SUPPORT MEANS HAVING A PAIR OF UPSTANDING LEGS, A FULCRUM MEANS SUPPORTED IN AND POSITIONED ACROSS SAID UPSTANDING LEGS, A YOKE MEANS SUPPORTED FROM SAID FULCRUM MEANS IN DEPENDING MANNER, AN ELONGATED FLAT BEAM OF SUBSTANTIAL WIDTH SUPPORTED AT THE CENTRAL PORTION THEREOF ON SAID YOKE MEANS, AND PAN MEANS SECURED TO EACH END OF SAID ELONGATED FLAT BEAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |