US3405772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling device
Assignee: American Coldset Corp
•
Filing: 1966-09-28
•
Granted: 1968-10-15
•
Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 John D Wisenbaker
- 👤 Robert W Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:25
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1705623A
Cited
US1919461A
Cited
US2327023A
Cited
US2481009A
Cited
US2825533A
Cited
US3173500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |