Patent US2273476A successfully refreshed from Google Patents.
Patent US1491832A successfully refreshed from Google Patents.
US1491832A
Expired / Lapsed
US
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Apparatus for making concrete piles
Assignee: Individual
•
Filing: 1921-06-18
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Granted: 1924-04-29
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Expires: 1941-06-18
Abstract
No abstract record available.
Inventors
- 👤 Upson Maxwell Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:30
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/66; E02D5/665; E02D7/00; E02D7/28; E02D7/30
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) | 1927-04-29 | 1927-10-29 | 1928-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-04-29 | 1931-10-29 | 1932-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-04-29 | 1935-10-29 | 1936-04-29 | $7700.00 | Window Closed / Lapsed |