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Patent US2854704A successfully refreshed from Google Patents.
US2854704A
Expired / Lapsed
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Prefabricated grandstand
Assignee: Individual
•
Filing: 1955-01-17
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Granted: 1958-10-07
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 William B Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:35
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH49538A
Cited
US1367497A
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CH97363A
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US2054960A
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US1745087A
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US1839679A
Cited
US2158939A
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US2297101A
Cited
US2611422A
Cited
US2606345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |