Patent US2077720A successfully refreshed from Google Patents.
US2077720A
Expired / Lapsed
US
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Felted product and method of making the same
Assignee: Johns Manville Corp
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Filing: 1935-05-28
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Granted: 1937-04-20
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Expires: 1955-05-28
Abstract
No abstract record available.
Inventors
- 👤 William R Seigle
- 👤 Brown George Basil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
C; C04; C04B; C04B30/00; C04B30/02; D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H27/00; D21H27/02; D21J; D21J1/00; D21J1/16; D21H13/40; D21H13/42; D21H27/30; D21H27/38; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24562
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) | 1940-04-19 | 1940-10-19 | 1941-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-04-19 | 1944-10-19 | 1945-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-04-19 | 1948-10-19 | 1949-04-20 | $7700.00 | Window Closed / Lapsed |