US3335306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current power source for electric arc welding
Assignee: Lincoln Electric Co
•
Filing: 1965-02-10
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Granted: 1967-08-08
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Expires: 1985-02-10
Abstract
No abstract record available.
Inventors
- 👤 George G Landis
- 👤 James B Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:13
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/10; B23K9/1006; H; H02; H02K; H02K39/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
AN ALTERNATING CURRENT GENERATOR COMPRISED OF A PLURALITY OF FIELD POLES OF ALTERNATE MAGNETIC PLOARITY ARRANGED AROUND AN ARMATURE OPENING, AN ARMATURE ROTATRABLE IN SAID OPENING IN A PREDETERMINED DIRECTION, AND HAVING ONE COIL SIDE OPENINGS FOR EACH FIELD POLE AND COIL SIDES IN SAID OPENINGS, EACH FIELD POLE BEING COMPRISED OF A LEADING PORTION AND A TRAILING PORTION, MEANS FOR MAGNETIZING THE LEADING PORTION INDEPENDENTLY OF THE TRAILING PORTION, THE
References Cited (Backward Citations)
US1112833A
Cited
US2939069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |