Patent US638574A successfully refreshed from Google Patents.
US638574A
Expired / Lapsed
US
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Manhole frame and cover.
Assignee: GREGER Manufacturing Co
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Filing: 1899-04-25
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Granted: 1899-12-05
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Expires: 1919-04-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Greger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:52
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/28; Y; Y10; Y10T; Y10T292/00; Y10T292/23; Y10T292/237; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/554; Y10T70/5562; Y10T70/5575; Y10T70/5611; Y10T70/5854; Y10T70/5858
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) | 1902-12-05 | 1903-06-06 | 1903-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-12-05 | 1907-06-06 | 1907-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-12-05 | 1911-06-06 | 1911-12-06 | $7700.00 | Window Closed / Lapsed |