Patent US270627A successfully refreshed from Google Patents.
Patent US3087576A successfully refreshed from Google Patents.
US3087576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound absorbers
Assignee: Pittsburgh Corning LLC
•
Filing: 1958-06-20
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Granted: 1963-04-30
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Expires: 1978-06-20
Abstract
No abstract record available.
Inventors
- 👤 D Eustachio Dominic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:24
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/08; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/8227; E04B1/84; E04B1/86; G; G10; G10K; G10K11/00; G10K11/16; G10K11/172; E04B2001/8245; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848; E04B2001/849
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AN ABSORBER FOR ACOUSTIC ENERGY, COMPRISING A PAIR OF SLABS OF OPEN-CELLED CELLULAR GLASS, EACH OF SAID SLABS HAVING A PLURAITY OF ELONGATED CAVITIES EXTENDING INTO THE SAME FROM OPPOSITE PRINCIPAL FACES THEREOF MORE THAN
Claim 2
Dependent Claim
35 words
AN ABSORBER FOR ACOUSTIC ENERGY, COMPRISING A PAIR OF SLABS OF OPEN-CELLED CELLULAR GLASS, EACH OF SAID SLABS HAVING A PLURAITY OF ELONGATED CAVITIES EXTENDING INTO THE SAME FROM OPPOSITE PRINCIPAL FACES THEREOF MORE THAN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |