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US3528131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast simulated marble building product and its manufacture
Assignee: EIDP Inc
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Filing: 1968-12-19
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Granted: 1970-09-15
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Expires: 1988-12-19
Abstract
No abstract record available.
Inventors
- 👤 Ray Brown Duggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:16
CPC Classifications
B; B29; B29C; B29C31/00; B29C31/04; B29B; B29B7/00; B29B7/74; B29B7/7461; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/17; B29C48/175; B29K; B29K2995/00; B29K2995/0018; B29K2995/002; B29K2995/0021; B29L; B29L2031/00; B29L2031/722
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2963736A
Cited
US2803041A
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US2880455A
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US3064307A
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USRE26237E
Cited
US3241503A
Cited
US3405425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |