US2950131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet metal attachment means
Assignee: STANDARD METAL FABRICATING CO
•
Filing: 1956-09-21
•
Granted: 1960-08-23
•
Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Hennen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:47
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/02; F16L41/025; F16L9/00; F16L9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1518479A
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US2393867A
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US2531349A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |