Patent US3550341A successfully refreshed from Google Patents.
US3550341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical ceiling system
Assignee: Individual
•
Filing: 1969-05-19
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Granted: 1970-12-29
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Expires: 1989-05-19
Abstract
No abstract record available.
Inventors
- 👤 Walter W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:01
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/04; E04B9/0478; E04B9/001; E04B9/0485; E04B9/06; E04B9/12; E04B9/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |