Patent US2665953A successfully refreshed from Google Patents.
US2665953A
Expired / Lapsed
US
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Knockdown scaffold having safety lock
Assignee: BEAVER ART METAL Corp
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Filing: 1951-09-13
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Granted: 1954-01-12
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Expires: 1971-09-13
Abstract
No abstract record available.
Inventors
- 👤 Clair F Maroney
- 👤 Daniel I Weisz
- 👤 Ralph W Mcgrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:48
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/30; E04G7/302; E04G7/306; E04G7/308; F; F16; F16B; F16B2200/00; F16B2200/69
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |