Patent US3125973A successfully refreshed from Google Patents.
US3125973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement in sewing machines for exchanging bobbins
Assignee: —
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Filing: —
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Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:51
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; D; D05; D05B; D05B59/00; D05B59/04; D05B57/00; D05D; D05D2203/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
IN A SEWING MACHINE HAVING A RECIPROCATING NEEDLE ADAPTED TO SEW WITH A TOP THREAD AND A BOTTOM THREAD AT A NEEDLE WORKING POSITION, MEANS FOR SUPPLYING BOTTOM THREAD TO SAID WORKING POSITION, SAID MEANS COMPRISING A ROTATABLE MEMBER POSITIONED BELOW SAID NEEDLE, AT LEAST TWO SPACED HOOKS ON SAID MEMBER FOR CARRYING A SUPPLY OF SAID BOTTOM THREAD, SAID HOOKS BEING SPACED FROM EACH OTHER SO THAT WHEN ONE IS IN THE WORKING POSITION, THE OTHER IS IN A NON-WORKING, THREAD REPLENISHING POSITION, AND MEANS FOR ROTATING SAID MEMBER SO THAT SAID SPACED HOOKS ARE SEQUENTIALLY BROUGHT INTO SAID WORKING POSITION FROM THE NON-WORKING POSITION.
References Cited (Backward Citations)
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US906987A
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US1413274A
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US2023398A
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US2733676A
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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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |