Patent US3020602A successfully refreshed from Google Patents.
US3020602A
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Wallboard fastener
Assignee: Johns Manville Corp
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Filing: 1957-11-07
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Granted: 1962-02-13
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Robert L Siering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:41
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803; E04F13/081; E04F13/0816; Y; Y10; Y10S; Y10S411/00; Y10S411/921; Y10S52/00; Y10S52/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2066814A
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US2197750A
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US2295444A
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US2282624A
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US2325766A
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US2527124A
Cited
US2742778A
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US2780850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |