Patent US3476912A successfully refreshed from Google Patents.
US3476912A
Expired / Lapsed
US
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Panel for composite wall structure
Assignee: JOHN SWENSON GRANITE CO Inc
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Filing: 1968-03-13
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Granted: 1969-11-04
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Expires: 1988-03-13
Abstract
No abstract record available.
Inventors
- 👤 Langdon I Garrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB373883A
Cited
US1941492A
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US2633735A
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GB647302A
Cited
US2769333A
Cited
FR1174629A
Cited
US3057989A
Cited
US3037746A
Cited
US3158963A
Cited
US3302358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |