US1950430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of impregnation and product obtained thereby
Assignee: EIDP Inc
•
Filing: 1931-10-07
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Granted: 1934-03-13
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Expires: 1951-10-07
Abstract
No abstract record available.
Inventors
- 👤 William S Calcott
- 👤 Albert S Carter
- 👤 Frederick B Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:19
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/227; C; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/48; C04B41/4857; C08; C08L; C08L97/00; C08L97/02; B; B27; B27K; B27K3/00; B27K3/02; B27K3/15; C08L49/00; Y; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T428/4935; Y10T428/662; Y10T442/00; Y10T442/20; Y10T442/2221; Y10T442/2549
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) | 1937-03-12 | 1937-09-11 | 1938-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-12 | 1941-09-11 | 1942-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-12 | 1945-09-11 | 1946-03-13 | $7700.00 | Window Closed / Lapsed |