US3489006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat meter
Assignee: Comstock and Wescott Inc
•
Filing: 1965-12-06
•
Granted: 1970-01-13
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Expires: 1985-12-06
Abstract
No abstract record available.
Inventors
- 👤 Dennis W Holdsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:45
CPC Classifications
G; G01; G01K; G01K17/00; G01K17/06; G01K17/08; G01K17/10; G01K17/12; G01K17/18; G01K17/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US304082A
Cited
US1005671A
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US2359767A
Cited
US2633748A
Cited
US2633749A
Cited
US3343083A
Cited
US3301049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |