Patent US2140672A successfully refreshed from Google Patents.
US2140672A
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US
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Method of producing a seal
Assignee: Glenn L Martin Co
•
Filing: 1937-04-17
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Granted: 1938-12-20
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Expires: 1957-04-17
Abstract
No abstract record available.
Inventors
- 👤 Reid B Gray
- 👤 Harry M Shealey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; Y; Y10; Y10S; Y10S206/00; Y10S206/819; Y10S29/00; Y10S29/034; Y10S411/00; Y10S411/915; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49947; Y10T29/49966; Y10T428/00; Y10T428/19
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) | 1941-12-19 | 1942-06-20 | 1942-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-19 | 1946-06-20 | 1946-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-19 | 1950-06-20 | 1950-12-20 | $7700.00 | Window Closed / Lapsed |