Patent US2365987A successfully refreshed from Google Patents.
US3403631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow metering and dividing device
Assignee: Dempster Industries Inc
•
Filing: 1967-03-28
•
Granted: 1968-10-01
•
Expires: 1987-03-28
Abstract
No abstract record available.
Inventors
- 👤 Lawrence N Tangeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:58
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1215; A; A01; A01G; A01G25/00; A01G25/16; F04B43/0009; F04B43/0054; F04B43/0072
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB467288A
Cited
US2406485A
Cited
US2911827A
Cited
US2885967A
Cited
US2913992A
Cited
US3079868A
Cited
US3122103A
Cited
US3172367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |