Patent US3429487A successfully refreshed from Google Patents.
US3429487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory floor construction
Assignee: Resco Products Inc
•
Filing: 1967-07-13
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Granted: 1969-02-25
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Expires: 1987-07-13
Abstract
No abstract record available.
Inventors
- 👤 William T Tredennick
- 👤 James Richard Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:04
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; B; B22; B22D; B22D41/00; B22D41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2526289A
Cited
US2818248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |