US3531902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated construction elements
Assignee: Lusaite-Sociedade Portuguesa de Fibro Cimento SARL
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Filing: 1968-01-29
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Granted: 1970-10-06
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Expires: 1988-01-29
Abstract
No abstract record available.
Inventors
- 👤 Pedro Croner Selestino D Costa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:52
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/357; E04B; E04B2/00; E04B2/56; E04B5/00; E04B5/02; E04B5/04; E04B5/06; E04C; E04C2/00; E04C2/02; E04C2/08
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) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |