US3395039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rendering porous articles water-repellent
Assignee: Pfizer Inc
•
Filing: 1965-09-29
•
Granted: 1968-07-30
•
Expires: 1985-09-29
Abstract
No abstract record available.
Inventors
- 👤 John R Leebrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:13
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/50; D06M13/51; C; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/49; C14; C14C; C14C9/00; C04B2111/00; C04B2111/20; C04B2111/27; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2164
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |