Patent US4538839A successfully refreshed from Google Patents.
US3085253A
Expired / Lapsed
US
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Ear pads
Assignee: RCA Corp
•
Filing: 1959-07-20
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Granted: 1963-04-16
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Robert E Ulrich
- 👤 Everett R Ware
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PAD COMPRISING A SEALED TUBE-LIKE SHEATH OF PLASTICIZED PLASTIC, SAID SHEATH BEING FILLED WITH A MIXTURE COMPRISING A FILLER OF GREASE AND A PLASTICIZER FOR SAID PLASTIC.
Claim 2
Dependent Claim
28 words
A PAD COMPRISING A SEALED TUBE-LIKE SHEATH OF PLASTICIZED PLASTIC, SAID SHEATH BEING FILLED WITH A MIXTURE COMPRISING A FILLER OF GREASE AND A PLASTICIZER FOR SAID PLASTIC.
References Cited (Backward Citations)
US707550A
Cited
US2094534A
Cited
US2262568A
Cited
US2653601A
Cited
US2801423A
Cited
US2990553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |