Patent US2820238A successfully refreshed from Google Patents.
US2820238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wipers for windshields severely curved in part
Assignee: Individual
•
Filing: 1955-03-23
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Granted: 1958-01-21
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Expires: 1975-03-23
Abstract
No abstract record available.
Inventors
- 👤 Laura E Roth
- 👤 John W Merriott
- 👤 Applegate Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:34
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/32; B60S1/34; B60S1/3402; B60S1/3406; B60S1/3409; B60S1/40; B60S1/4006; B60S1/42
Claims Analysis
Total Claims: 0
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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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |