Patent US867852A successfully refreshed from Google Patents.
US867852A
Expired / Lapsed
US
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Device for laying concrete pavements.
Assignee: HENRY G CAMPBELL
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Filing: 1907-02-28
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Granted: 1907-10-08
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Expires: 1927-02-28
Abstract
No abstract record available.
Inventors
- 👤 George W Switzer
- 👤 George F Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:20
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/42
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) | 1910-10-07 | 1911-04-08 | 1911-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-10-07 | 1915-04-08 | 1915-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-10-07 | 1919-04-08 | 1919-10-08 | $7700.00 | Window Closed / Lapsed |