US3049736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming aid
Assignee: LARS E BIRBACH
•
Filing: 1959-06-03
•
Granted: 1962-08-21
•
Expires: 1979-06-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:25
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/11; B63C9/125; B63C9/1255
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1212315A
Cited
FR448310A
Cited
US1505766A
Cited
US1481144A
Cited
US1854378A
Cited
US2017868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |