Patent US3372520A successfully refreshed from Google Patents.
US3372520A
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Tongue and groove insulated panels and demountable barrier construction thereof
Assignee: Hunter Douglas International Ltd
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Filing: 1965-07-19
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Granted: 1968-03-12
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Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Erich E Hensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:19
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; E; E04; E04B; E04B1/00; E04B1/38; E04B1/61; E04B1/6108; E04B1/612; E04B1/6179; E04B2/00; E04B2/56; E04B2/58; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/292; E04C2/30; E04C2/38; E04C2/384; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803; E04F13/081; E04F13/0821; E04F13/0826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE262934C
Cited
FR405352A
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US1831281A
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US2009056A
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US1951778A
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US2069176A
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US2316424A
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US3224155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |