US3280454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for forming ladders
Assignee: Howard B Rich Inc
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Filing: 1965-06-03
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Granted: 1966-10-25
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Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 Howard B Rich
- 👤 Andrew T Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:45
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/06; B21D39/063; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994; Y10T29/53; Y10T29/53709; Y10T29/53717
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A MACHINE FOR ATTACHING A TUBULAR METAL RUNG TO A SIDE RAIL WHICH COMPRISES MEANS FOR RESILIENTLY HOLDING THE SIDE RAIL WITH A PREDETERMINED END PORTION OF THE RUNG PROJECTING THROUGH AN OPENING IN THE RAIL, MEANS FOR HOLDING THE RUNG AGAINST AXIAL MOVEMENT, A PLUNGER ENGAGEABLE WITH AN END OF THE RUNG, AND MEANS FOR ADVANCING THE PLUNGER AXIALLY OF THE RUNG TO FORM A FIRST BEAD ON THE RUNG ON ONE SIDE OF THE RAIL WHILE THE RESILIENT HOLDING MEANS MAINTAINS THE RAIL IN ITS FIRST POSITION AND FOR FURTHER ADVANCING THE PLUNGER AXIALLY OF THE RUNG TO FORM A SECOND BEAD ON THE RUNG ON THE OTHER SIDE OF THE RAIL WHILE THE RESILIENT HOLDING MEANS YIELDS TO PERMIT MOVEMENT OF THE RAIL WITH THE PLUNGER AS THE SECOND BEAD IS FORMED.
Claim 2
Dependent Claim
135 words
A MACHINE FOR ATTACHING A TUBULAR METAL RUNG TO A SIDE RAIL WHICH COMPRISES MEANS FOR RESILIENTLY HOLDING THE SIDE RAIL WITH A PREDETERMINED END PORTION OF THE RUNG PROJECTING THROUGH AN OPENING IN THE RAIL, MEANS FOR HOLDING THE RUNG AGAINST AXIAL MOVEMENT, A PLUNGER ENGAGEABLE WITH AN END OF THE RUNG, AND MEANS FOR ADVANCING THE PLUNGER AXIALLY OF THE RUNG TO FORM A FIRST BEAD ON THE RUNG ON ONE SIDE OF THE RAIL WHILE THE RESILIENT HOLDING MEANS MAINTAINS THE RAIL IN ITS FIRST POSITION AND FOR FURTHER ADVANCING THE PLUNGER AXIALLY OF THE RUNG TO FORM A SECOND BEAD ON THE RUNG ON THE OTHER SIDE OF THE RAIL WHILE THE RESILIENT HOLDING MEANS YIELDS TO PERMIT MOVEMENT OF THE RAIL WITH THE PLUNGER AS THE SECOND BEAD IS FORMED.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |