Patent US3209874A successfully refreshed from Google Patents.
US3209874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-mechanical power transmission system
Assignee: ExxonMobil Oil Corp
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Filing: 1962-11-09
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Granted: 1965-10-05
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Foster George
- 👤 James J Donnelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:07
CPC Classifications
F; F16; F16D; F16D35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A FLUID-MECHANICAL POWER TRANSMISSION SYSTEM COMPRISING A ROTATABLE DRIVE MEMBER, A ROTATABLE DRIVEN MEMBER HAVING AN APERTURE THEREIN, A VISCOELASTIC FLUID DISPOSED BETWEEN SAID DRIVE MEMBER AND SAID DRIVEN MEMBER AND WHICH PROVIDES A FORCE NORMAL TO THE SHEAR STRESS EXERTED IN SAID FLUID WHEN SAID DRIVE MEMBER IS ROTATED, SAID DRIVEN MEMBER BEING FURTHER CHARACTERIZED BY COM-
Claim 2
Dependent Claim
58 words
A FLUID-MECHANICAL POWER TRANSMISSION SYSTEM COMPRISING A ROTATABLE DRIVE MEMBER, A ROTATABLE DRIVEN MEMBER HAVING AN APERTURE THEREIN, A VISCOELASTIC FLUID DISPOSED BETWEEN SAID DRIVE MEMBER AND SAID DRIVEN MEMBER AND WHICH PROVIDES A FORCE NORMAL TO THE SHEAR STRESS EXERTED IN SAID FLUID WHEN SAID DRIVE MEMBER IS ROTATED, SAID DRIVEN MEMBER BEING FURTHER CHARACTERIZED BY COM-
References Cited (Backward Citations)
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US2342414A
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US2361385A
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US2706547A
Cited
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Cited
US2775317A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |