Patent US1734660A successfully refreshed from Google Patents.
US1734660A
Expired / Lapsed
US
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Metallic flooring or grating
Assignee: NEW ENGINEERING CONSTRUCTION C
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Filing: 1927-11-19
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Granted: 1929-11-05
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Expires: 1947-11-19
Abstract
No abstract record available.
Inventors
- 👤 Williams George Brailey
- 👤 Porter William James Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:57
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/421; E04C2/422; E04C2/425; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/4962
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-11-04 | 1933-05-06 | 1933-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-04 | 1937-05-06 | 1937-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-04 | 1941-05-06 | 1941-11-05 | $7700.00 | Window Closed / Lapsed |