Patent US3491499A successfully refreshed from Google Patents.
US3491499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deck of concrete slabs and method of making the same
Assignee: Flexicore Co Inc
•
Filing: 1968-04-08
•
Granted: 1970-01-27
•
Expires: 1988-04-08
Abstract
No abstract record available.
Inventors
- 👤 Wilmer E Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:17
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US88766A
Cited
US3124047A
Cited
CA696514A
Cited
US2266464A
Cited
US2446323A
Cited
US3108813A
Cited
US3334558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |