Patent US3405490A successfully refreshed from Google Patents.
US3405490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor structure for posttensioned tendons
Assignee: ROBERT R LA MARR
•
Filing: 1967-01-10
•
Granted: 1968-10-15
•
Expires: 1987-01-10
Abstract
No abstract record available.
Inventors
- 👤 Marr Robert R La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:36
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; E04G21/121; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/125; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3909
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |