US3431945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plumber's pneumatic plug
Assignee: HUBERT A ROBILLARD
•
Filing: 1966-05-23
•
Granted: 1969-03-11
•
Expires: 1986-05-23
Abstract
No abstract record available.
Inventors
- 👤 Hubert A Robillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:38
CPC Classifications
E; E03; E03F; E03F7/00; E03F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1221733A
Cited
US1993387A
Cited
US2279257A
Cited
US2299116A
Cited
US3091259A
Cited
US3241571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |