Patent US3145823A successfully refreshed from Google Patents.
US3145823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Typewriter ribbon spool construction
Assignee: Individual
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Filing: 1962-11-13
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Granted: 1964-08-25
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Erdman O Spradlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:03
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A TYPEWRITER RIBBON SPOOL CONSTRUCTION, COMPRISING A PAIR OF SPACED DISCS EACH HAVING AN AXIALLY EXTENDING PORTION, AND A TUBULAR CORE OF SEMI-RIGID RESILIENT MATERIAL INTERPOSED BETWEEN SAID DISCS AND ADAPTED TO RECEIVE A TYPEWRITER RIBBON THEREAROUND, SAID TUBULAR CORE HAVING AN ANNULAR GROOVE IN EACH END FACE THEREOF, EACH OF SAID GROOVES BEING FORMED BY TWO ADJACENT CONCENTRIC WALLS, SAID GROOVES BEING OF A LESSER WIDTH THAN THE RADIAL THICKNESS OF SAID AXIALLY EXTENDING PORTIONS SUCH THAT THE LATTER ARE FRICTIONALLY RETAINED BY THE FORMER WHEN INSERTED THEREIN BY VIRTUE OF THE RESILIENCY OF SAID MATERIAL, WHEREBY SAID DISCS ARE RELEASABLY SECURED TO SAID CORE TO PERMIT REPLACEMENT OF SAID CORE WHEN AN ASSOCIATED TYPEWRITER RIBBON CARRIED THEREBY IS EXHAUSTED.
Claim 2
Dependent Claim
121 words
A TYPEWRITER RIBBON SPOOL CONSTRUCTION, COMPRISING A PAIR OF SPACED DISCS EACH HAVING AN AXIALLY EXTENDING PORTION, AND A TUBULAR CORE OF SEMI-RIGID RESILIENT MATERIAL INTERPOSED BETWEEN SAID DISCS AND ADAPTED TO RECEIVE A TYPEWRITER RIBBON THEREAROUND, SAID TUBULAR CORE HAVING AN ANNULAR GROOVE IN EACH END FACE THEREOF, EACH OF SAID GROOVES BEING FORMED BY TWO ADJACENT CONCENTRIC WALLS, SAID GROOVES BEING OF A LESSER WIDTH THAN THE RADIAL THICKNESS OF SAID AXIALLY EXTENDING PORTIONS SUCH THAT THE LATTER ARE FRICTIONALLY RETAINED BY THE FORMER WHEN INSERTED THEREIN BY VIRTUE OF THE RESILIENCY OF SAID MATERIAL, WHEREBY SAID DISCS ARE RELEASABLY SECURED TO SAID CORE TO PERMIT REPLACEMENT OF SAID CORE WHEN AN ASSOCIATED TYPEWRITER RIBBON CARRIED THEREBY IS EXHAUSTED.
References Cited (Backward Citations)
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US802189A
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |