US2043988A
Expired / Lapsed
US
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Assignee: Johns Manville Corp
•
Filing: 1933-02-28
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Granted: 1936-06-16
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Expires: 1953-02-28
Abstract
No abstract record available.
Inventors
- 👤 George B Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:45
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/742; E04B2001/747; E04B2001/8414; E04B2001/8423; E04B2001/8433; E04B2001/8438; E04B2001/8452; E04B2001/8457; E04B2001/8461; E04B2001/8471; E04B2001/8476; E04B2001/848; E04B2001/8485; Y; Y10; Y10S; Y10S138/00; Y10S138/04; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24281; Y10T428/24322; Y10T428/24355; Y10T428/24628; Y10T428/24661; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
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) | 1939-06-16 | 1939-12-16 | 1940-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-16 | 1943-12-16 | 1944-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-16 | 1947-12-16 | 1948-06-16 | $7700.00 | Window Closed / Lapsed |