Patent US3172236A successfully refreshed from Google Patents.
US3172236A
Expired / Lapsed
US
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Counterflashing
Assignee: Individual
•
Filing: 1963-05-20
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Granted: 1965-03-09
•
Expires: 1983-05-20
Abstract
No abstract record available.
Inventors
- 👤 Hugh A Weckerly
- 👤 Hugh D Weckerly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:30
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/14; E04D13/1407; E04D13/1415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1377349A
Cited
US1905017A
Cited
US2255156A
Cited
US2105996A
Cited
US2937652A
Cited
US3011824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |