US3021916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced acoustical unit
Assignee: Individual
•
Filing: 1959-04-06
•
Granted: 1962-02-20
•
Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 William G Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:41
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/04; E04B9/0442; E04B9/001; E04B9/0478; E04B9/0485; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; E04B1/00; E04B1/62; E04B1/74; E04B2001/742; E04B2001/748; E04B1/82; E04B1/84; E04B2001/8423; E04B2001/8433; E04B2001/8442; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN ACOUSTICAL PANEL, COMPRISING A SUBSTANTIALLY FLATPERFORATED PAN ADAPTED TO BE EXPOSED TO SOUND WHICH
Claim 2
Dependent Claim
15 words
AN ACOUSTICAL PANEL, COMPRISING A SUBSTANTIALLY FLATPERFORATED PAN ADAPTED TO BE EXPOSED TO SOUND WHICH
References Cited (Backward Citations)
US1992509A
Cited
US2180945A
Cited
US2334484A
Cited
US2449292A
Cited
US2477852A
Cited
GB663897A
Cited
GB723621A
Cited
US2744042A
Cited
FR64827E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |