Patent US3579724A successfully refreshed from Google Patents.
US3579724A
Expired / Lapsed
US
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Apparatus for the manufacture of composite structural elements
Assignee: Anchor Enterprises Corp
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Filing: 1969-09-19
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Granted: 1971-05-25
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Expires: 1989-09-19
Abstract
Abstract A STRUCTURAL ELEMENT WITH THERMAL BARRIER MEANS HAVING AN ELONGATED THERMAL INSULATING PLASTIC LOCKING MEMBER WITH PORTIONS WHICH INTERLOCK IN ELONGATED TRACKS FORMED IN TWO ELONGATED METAL MEMBERS TO FORM A RIGID UNITARY MEMBER.
Inventors
- 👤 Louis Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/263; E06B3/277; E06B3/26301; E06B3/26305; E06B3/26307; E06B3/96; E06B3/9604; E06B3/9608; E06B3/964; E06B3/968; E06B3/9681; E06B3/9682; E06B2003/26309; E06B2003/26349; E06B2003/2635; E06B2003/26352; E06B2003/26354; Y; Y10; Y10S; Y10S49/00; Y10S49/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |