Patent US3131543A successfully refreshed from Google Patents.
US3131543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible piling
Assignee: Individual
•
Filing: 1960-12-05
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Granted: 1964-05-05
•
Expires: 1980-12-05
Abstract
No abstract record available.
Inventors
- 👤 John J Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/52; E02D5/66; E02D5/665; E02D7/00; E02D7/28; E02D7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1769774A
Cited
US1839304A
Cited
US1997312A
Cited
US2342243A
Cited
US2693087A
Cited
US2924949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |