Patent US2431082A successfully refreshed from Google Patents.
US2431082A
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Manhole adapter
Assignee: LOUISE P SAYLES
•
Filing: 1945-02-06
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Granted: 1947-11-18
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Expires: 1965-02-06
Abstract
No abstract record available.
Inventors
- 👤 Louis F Sayles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:49
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US599441A
Cited
GB191328525A
Cited
US1364323A
Cited
US1639495A
Cited
US1751194A
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US1959171A
Cited
GB435057A
Cited
US2254668A
Cited
US2315236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |