Patent US2777253A successfully refreshed from Google Patents.
US2777253A
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System for improving growing conditions for plants and farm animals in unfavorable climates by solar energy
Assignee: W G ATKINSON
•
Filing: 1952-04-30
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Granted: 1957-01-15
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Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Basil M Bensin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:51
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/24; A01G9/243; A01G7/00; A01G7/04; A01G7/045; A01G9/249; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25; Y02P; Y02P60/00; Y02P60/12; Y02P60/14; Y10; Y10S; Y10S47/00; Y10S47/06
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |