US3405487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arched skylight with attachment flanges
Assignee: W J VAN DE KERKE AND ZOON NV
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Filing: 1966-01-20
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Granted: 1968-10-15
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Expires: 1986-01-20
Abstract
No abstract record available.
Inventors
- 👤 Kerke Dirk Van De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:21
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/24; E04D3/28; E04D13/00; E04D13/03; E04D13/032
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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |