Patent US3421858A successfully refreshed from Google Patents.
US3479784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction panel
Assignee: Tru Lok Metal Fabricating Co Inc
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Filing: 1967-12-05
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Granted: 1969-11-25
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Expires: 1987-12-05
Abstract
No abstract record available.
Inventors
- 👤 Daniel Massagli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/292
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1081485A
Cited
US2146180A
Cited
US2612246A
Cited
US3067814A
Cited
US3131794A
Cited
US3343321A
Cited
US3290845A
Cited
US3399503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |