Patent US2373500A successfully refreshed from Google Patents.
US2373500A
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US
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Method and apparatus for making felted materials
Assignee: Johns Manville Corp
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Filing: 1943-01-01
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Granted: 1945-04-10
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Expires: 1963-01-01
Abstract
No abstract record available.
Inventors
- 👤 Gale T Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
CPC Classifications
D; D04; D04H; D04H17/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1067; Y10T156/1069; Y10T156/12; Y10T156/13; Y10T83/00; Y10T83/202; Y10T83/2074; Y10T83/2083
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) | 1948-04-09 | 1948-10-09 | 1949-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-09 | 1952-10-09 | 1953-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-09 | 1956-10-09 | 1957-04-10 | $7700.00 | Window Closed / Lapsed |