US3524790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simulated masonry facing panel
Assignee: Millennium Petrochemicals Inc
•
Filing: 1967-01-03
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Granted: 1970-08-18
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Richard A Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
B; B44; B44F; B44F9/00; B44F9/04; Y; Y10; Y10T; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/195; Y10T428/24; Y10T428/24777; Y10T428/25; Y10T428/251
Claims Analysis
Total Claims: 0
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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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |