US3400446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of lever handle
Assignee: Individual
•
Filing: 1963-10-15
•
Granted: 1968-09-10
•
Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Yulkowski Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:21
CPC Classifications
E; E05; E05B; E05B1/00; E05B1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893; Y10T29/4998; Y10T292/00; Y10T292/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF MAKING DOOR HANDLES COMPRISING THE FOLLOWING STEPS: (1) STAMPING AT LEAST A PAIR OF SUBSTANTIALLY SYMMETRICAL SHELLS OF THE DESIRED FORM; (2) ASSEMBLING THE SHELLS WITH THEIR PERIPHERAL EDGES IN OPPOSED ENGAGING RELATION WITH AN INSERT RECEIVING RECESS THEREBETWEEN; (3) APPLYING A FUSIBLE ALLOY ALONG AND ADJACENT THE PERIPHERAL ENGAGING EDGES OR SURFACES OF THE SHELLS; (4) WELDING THE SHELLS AT A SERIES OF PERIPHERAL SPACED POINTS FOR SECURING THE SHELLS TOGETHER; (5) FUSING THE ALLOY TO AND ALONG THE PERIPHERAL MEETING SHELL EDGE SURFACES; AND INSERT WITHIN SAID RECESS.
Claim 2
Independent Claim
93 words
THE METHOD OF MAKING DOOR HANDLES COMPRISING THE FOLLOWING STEPS: (1) STAMPING AT LEAST A PAIR OF SUBSTANTIALLY SYMMETRICAL SHELLS OF THE DESIRED FORM; (2) ASSEMBLING THE SHELLS WITH THEIR PERIPHERAL EDGES IN OPPOSED ENGAGING RELATION WITH AN INSERT RECEIVING RECESS THEREBETWEEN; (3) APPLYING A FUSIBLE ALLOY ALONG AND ADJACENT THE PERIPHERAL ENGAGING EDGES OR SURFACES OF THE SHELLS; (4) WELDING THE SHELLS AT A SERIES OF PERIPHERAL SPACED POINTS FOR SECURING THE SHELLS TOGETHER; (5) FUSING THE ALLOY TO AND ALONG THE PERIPHERAL MEETING SHELL EDGE SURFACES; AND INSERT WITHIN SAID RECESS.
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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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |