Patent US3234704A successfully refreshed from Google Patents.
US3234704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll formed sheet metal beam construction
Assignee: Equipment Manufacturing Inc
•
Filing: 1962-03-12
•
Granted: 1966-02-15
•
Expires: 1982-03-12
Abstract
No abstract record available.
Inventors
- 👤 Leonard G Burgess
- 👤 Richard E Wroblewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/06; E04C3/07; B; B21; B21C; B21C37/00; B21C37/06; B21C37/10; B21C37/104; B21D; B21D5/00; B21D5/06; B21D5/08; B21D5/086; E04C2003/0404; E04C2003/0408; E04C2003/0413; E04C2003/0426; E04C2003/043; E04C2003/0443; E04C2003/0465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A COMPOSITE SHEET METAL BOX SECTION RAIL CHARACTERIZED BY TWO INDIVIDUAL SHEET METAL COMPONENT ELEMENTS EACH HAVING A SIDE WALL PORTION AND TRANSVERSELY EXTENDING UPPER AND LOWER FLANGES, BOTH FLANGES OF ONE OF SAID ELEMENTS LYING INSIDE THE CORESPONDING FLANGES OF THE OTHER ELEMENT, THE EDGES THE INNER FLANGES TERMINATING AT THE SIDE WALL OF THE OUTER FLANGED ELEMENT, AND MEANS FOR INTERLOCKING SAID SHEET METAL ELEMENTS TOGETHER WITH THE FLANGES THEREOF IN OVERLAPPING ABUTTING RELATION COM-
Claim 2
Dependent Claim
77 words
A COMPOSITE SHEET METAL BOX SECTION RAIL CHARACTERIZED BY TWO INDIVIDUAL SHEET METAL COMPONENT ELEMENTS EACH HAVING A SIDE WALL PORTION AND TRANSVERSELY EXTENDING UPPER AND LOWER FLANGES, BOTH FLANGES OF ONE OF SAID ELEMENTS LYING INSIDE THE CORESPONDING FLANGES OF THE OTHER ELEMENT, THE EDGES THE INNER FLANGES TERMINATING AT THE SIDE WALL OF THE OUTER FLANGED ELEMENT, AND MEANS FOR INTERLOCKING SAID SHEET METAL ELEMENTS TOGETHER WITH THE FLANGES THEREOF IN OVERLAPPING ABUTTING RELATION COM-
References Cited (Backward Citations)
US190987A
Cited
US1457303A
Cited
US1997876A
Cited
US2091474A
Cited
US2185475A
Cited
US2762398A
Cited
US2975874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |