US3439449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for culturing and propagating marine algae
Assignee: SEA CHEM IND Ltd
•
Filing: 1967-01-11
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Granted: 1969-04-22
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Expires: 1987-01-11
Abstract
No abstract record available.
Inventors
- 👤 Walter Huff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:03
CPC Classifications
A; A01; A01G; A01G33/00; C; C12; C12M; C12M21/00; C12M21/02; C12M23/00; C12M23/38; C12M29/00; C12M29/04; C12M31/00; C12M31/08; Y; Y02; Y02A; Y02A40/00; Y02A40/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3195271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |