US2951477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watering tank heating unit
Assignee: Individual
•
Filing: 1958-04-08
•
Granted: 1960-09-06
•
Expires: 1978-04-08
Abstract
No abstract record available.
Inventors
- 👤 Harper Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:03
CPC Classifications
A; A01; A01K; A01K7/00; A01K7/02; A01K7/027; F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/205; F24H1/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US487806A
Cited
US793472A
Cited
US1760309A
Cited
DE512908C
Cited
US2289817A
Cited
US2515618A
Cited
US2606548A
Cited
US2560695A
Cited
US2617407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |