Patent US3512944A successfully refreshed from Google Patents.
US3512944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burette with removable stopcock formed of synthetic resin
Assignee: Corning Glass Works
•
Filing: 1967-09-13
•
Granted: 1970-05-19
•
Expires: 1987-09-13
Abstract
No abstract record available.
Inventors
- 👤 Michael A Craig
- 👤 Walter I Holms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:57
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/56; B01L3/567; B01L3/02; B01L3/0203; F; F16; F16K; F16K27/00; F16K27/06; F16K27/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2988321A
Cited
US3323874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |