US2301538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound insulating construction
Assignee: Waldorf Paper Products Co
•
Filing: 1938-06-04
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Granted: 1942-11-10
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Expires: 1958-06-04
Abstract
No abstract record available.
Inventors
- 👤 Guyer Reynolds
- 👤 Henry E Hartig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/742; E04B2001/747; E04B2001/8457; E04B2001/8476; E04B2001/848; E04B2001/849
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) | 1945-11-09 | 1946-05-11 | 1946-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-09 | 1950-05-11 | 1950-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-09 | 1954-05-11 | 1954-11-10 | $7700.00 | Window Closed / Lapsed |