Patent US2981990A successfully refreshed from Google Patents.
US2981990A
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US
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Assignee: Individual
•
Filing: 1957-09-20
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Granted: 1961-05-02
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Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry N Balderree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:23
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/1616; B65D33/1625; Y; Y10; Y10T; Y10T24/00; Y10T24/15; Y10T24/155; Y10T24/34; Y10T24/3401; Y10T24/39; Y10T24/3916; Y10T24/3924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US479509A
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US565167A
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US1079527A
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US1243232A
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US1916733A
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US2246229A
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US2231273A
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GB688260A
Cited
US2783515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |