US3343573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roving can spring
Assignee: JAMES HILL Manufacturing CO
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Filing: 1965-04-14
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Granted: 1967-09-26
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 John J Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:08
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/04; B21F35/00; C; C21; C21D; C21D9/00; C21D9/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF MAKING A ROVING CAN SPRING WHICH COMPRISES THE STEPS OF WINDING HIGH CARBON HARD DRAWN MEDIUM BRIGHT WIRE ABOUT A MANDREL TO FORM A PREDETERMINED NUMBER OF COILS, PULLING OUT THE COILS TO A PREDETERMINED DISTANCE, AND DURING THIS STEP OF PULLING OUT THE COILS, TURNING THE COILS A PREDETERMINED NUMBER OF REVOLUTIONS, THEN HEAT TREATING THE PULLED-OUT COILS TO RELIEVE THE STRESSES THEREIN, AND COOLING THE HEATED COILS AT ROOM TEMPERATURE.
Claim 2
Independent Claim
75 words
THE METHOD OF MAKING A ROVING CAN SPRING WHICH COMPRISES THE STEPS OF WINDING HIGH CARBON HARD DRAWN MEDIUM BRIGHT WIRE ABOUT A MANDREL TO FORM A PREDETERMINED NUMBER OF COILS, PULLING OUT THE COILS TO A PREDETERMINED DISTANCE, AND DURING THIS STEP OF PULLING OUT THE COILS, TURNING THE COILS A PREDETERMINED NUMBER OF REVOLUTIONS, THEN HEAT TREATING THE PULLED-OUT COILS TO RELIEVE THE STRESSES THEREIN, AND COOLING THE HEATED COILS AT ROOM TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |