US3519708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming selectively permeable bodies from flexible polyurethane foam
Assignee: Dow Chemical Co
•
Filing: 1966-11-21
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Granted: 1970-07-07
•
Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Wallace T Mcmichael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:29
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; B; B01; B01D; B01D29/00; B01D29/01; B01D29/11; B01D29/13; B01D29/15; B01D39/00; B01D39/14; B01D39/16; B01D39/1669; B01D39/1676; C08J2375/00; C08J2375/04; C08J2463/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/249991
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2666954A
Cited
US2945262A
Cited
US3000464A
Cited
GB911427A
Cited
US3242239A
Cited
US3269887A
Cited
US3306967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |