US3548556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling lining,in particular for a suspended ceiling
Assignee: Hunter Douglas International Ltd
•
Filing: 1968-03-01
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Granted: 1970-12-22
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Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Gerardus Cornelis Vermeulen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/34; E04B9/36; E04B9/363
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |