US3518047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for retarding water evaporation
Assignee: Dow Silicones Corp
•
Filing: 1968-08-15
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Granted: 1970-06-30
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Expires: 1988-08-15
Abstract
No abstract record available.
Inventors
- 👤 Richard W Alsgaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:06
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/16; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C07F7/0896; C07F7/12; C07F7/18; C07F7/1804; C07F7/1896; C08; C08G; C08G77/00; C08G77/04; C08G77/38; Y; Y02; Y02P; Y02P20/00; Y02P20/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2640063A
Cited
US2797138A
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US2797139A
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US3146060A
Cited
US3095263A
Cited
US3431064A
Cited
US3450488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |