Patent US3297294A successfully refreshed from Google Patents.
US3297294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible joint forming structure
Assignee: Individual
•
Filing: 1965-04-09
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Granted: 1967-01-10
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Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 William F Middlestadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:06
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/02; E01C23/021; E01C11/00; E01C11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A JOINT FORMING STRUCTURE COMPRISING A METALLIC SHEET FOLDED TO FORM A HOLLOW ENVELOPE, SAID ENVELOPE TAPERING INWARDLY FROM A TOP PORTION TO THE BOTTOM THEREOF, SAID BOTTOM BEING SMOOTHLY ROUNDED IN TRANSVERSE SECTION AND SAID TOP PORTION BEING FORMED BY OVERLAPPING AND RELEAS-
Claim 2
Dependent Claim
44 words
A JOINT FORMING STRUCTURE COMPRISING A METALLIC SHEET FOLDED TO FORM A HOLLOW ENVELOPE, SAID ENVELOPE TAPERING INWARDLY FROM A TOP PORTION TO THE BOTTOM THEREOF, SAID BOTTOM BEING SMOOTHLY ROUNDED IN TRANSVERSE SECTION AND SAID TOP PORTION BEING FORMED BY OVERLAPPING AND RELEAS-
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |