Patent US3335524A successfully refreshed from Google Patents.
US3335524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal break door
Assignee: PPG Industries Inc
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Filing: 1965-10-21
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Granted: 1967-08-15
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Laurence F Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:10
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/263; E06B3/26336; Y; Y10; Y10S; Y10S49/00; Y10S49/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A MULTI-PART STRUCTURE COMPRISING A PAIR OF METALLIC MEMBERS DETACHABLY SECURED TOGETHER AND HAVING A GENERALLY U-SHAPED THERMAL BARRIER INCLUDING A WEB PORTION AND LEG PORTIONS EXTENDING THEREFROM DISPOSED BETWEEN SAID METALLIC MEMBERS THERMALLY TO ISOLATE ONE FROM THE OTHER, EACH OF SAID MEMBERS HAVING A WEB AND A PAIR OF FLANGES DISPOSED SUBSTANTIALLY NORMAL THERETO IN SPACED RELATIONSHIP, THE FLANGES ON ONE MEMBER OVERLAPPING RESPECTIVE ONES OF THE FLANGES ON THE OTHER MEMBER, MEANS TO SECURE ONE MEMBER TO THE OTHER COMPRISING FASTENER MEANS EXTENDING BETWEEN AND SECURED TO ASSOCIATED ONES OF SAID OVERLAPPING FLANGES, AND AN ADDITIONAL FLANGE EXTENDING BETWEEN AND INTERCONNECTING THE OUTER ENDS OF THE FLANGES OF SAID OTHER MEMBER THEREBY TO DEFINE AN ENCLOSED CHAMBER, ASSOCIATED ONES OF SAID OVERLAPPING FLANGES ON THE RESPECTIVE MEMBERS BEING DISPOSED IN
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |