US3146059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporation-suppressing agents and method of their production
Assignee: Kowa Co Ltd
•
Filing: 1958-11-10
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Granted: 1964-08-25
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Expires: 1978-11-10
Abstract
No abstract record available.
Inventors
- 👤 Suzuki Masaomi
- 👤 Mihara Yoshiaki
- 👤 Tomioka Tatsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:41
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A METHOD OF REDUCING EVAPORATION OF WATER FROM WATER SURFACES WHICH ARE EXPOSED TO THE ATMOSPHERE, COMPRISING THE STEP OF SPREADING ON SAID SURFACE AS AN INTERFACE BETWEEN SAID SURFACE AND THE ATMOSPHERE A THIN FILM OF MATERIAL OF THE FOLLOWING FORMULA:
Claim 2
Independent Claim
42 words
A METHOD OF REDUCING EVAPORATION OF WATER FROM WATER SURFACES WHICH ARE EXPOSED TO THE ATMOSPHERE, COMPRISING THE STEP OF SPREADING ON SAID SURFACE AS AN INTERFACE BETWEEN SAID SURFACE AND THE ATMOSPHERE A THIN FILM OF MATERIAL OF THE FOLLOWING FORMULA:
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |