US2604068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for damping mineral fibers to be sprayed in air
Assignee: J W ROBERTS Ltd
•
Filing: 1949-05-25
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Granted: 1952-07-22
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Expires: 1969-05-25
Abstract
No abstract record available.
Inventors
- 👤 Dolbey Norman Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:21
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/02; E04F21/06; E04F21/08; E04F21/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US524650A
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US1770011A
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US1990585A
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US1990584A
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US1973761A
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US2019079A
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US2073779A
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US2229566A
Cited
US2419410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |