US3521671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering apparatus
Assignee: GEORGE A HANDELAND
•
Filing: 1967-06-16
•
Granted: 1970-07-28
•
Expires: 1987-06-16
Abstract
No abstract record available.
Inventors
- 👤 George A Handeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8597
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1714300A
Cited
DE1023597B
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US2869926A
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US2960999A
Cited
US3166096A
Cited
US3194254A
Cited
US3416371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |