Patent US3021536A successfully refreshed from Google Patents.
US3021536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating support
Assignee: Individual
•
Filing: 1959-12-03
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Granted: 1962-02-20
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Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 James D Haggerty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:51
CPC Classifications
B; B63; B63B; B63B7/00; B63B7/06; B63B7/08; B63B34/00; B63B34/50; B63B34/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US763518A
Cited
US1263764A
Cited
US1503624A
Cited
US1656840A
Cited
US2334924A
Cited
US2683270A
Cited
FR1066565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |