US1904576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproofing composition
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1930-05-19
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Granted: 1933-04-18
•
Expires: 1950-05-19
Abstract
No abstract record available.
Inventors
- 👤 Twiss Douglas Frank
- 👤 Gorham Walter George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:17
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/18; C; C08; C08L; C08L7/00; C08L7/02; C08L91/00; C08L91/06; C08L91/08; C09; C09D; C09D191/00; C09D191/06; C09D191/08; D06; D06M; D06M15/00; D06M15/693; D21H19/20; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
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) | 1936-04-17 | 1936-10-17 | 1937-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-17 | 1940-10-17 | 1941-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-17 | 1944-10-17 | 1945-04-18 | $7700.00 | Window Closed / Lapsed |