Patent US2836786A successfully refreshed from Google Patents.
Patent US3206892A successfully refreshed from Google Patents.
US3206892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible cold frame
Assignee: Dow Chemical Co
•
Filing: 1960-05-24
•
Granted: 1965-09-21
•
Expires: 1980-05-24
Abstract
No abstract record available.
Inventors
- 👤 Telkes Maria
- 👤 Andrassy Stella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:54
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/20; A01G13/24; A01G13/26; A01G13/262; A01G9/00; A01G9/22; A01G9/225; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE68643C
Cited
US1112052A
Cited
US1930939A
Cited
US1964818A
Cited
US2028060A
Cited
US2505845A
Cited
US2691848A
Cited
US2720725A
Cited
US2910994A
Cited
DE1075888B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |