US2821900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chimney flue housing
Assignee: Individual
•
Filing: 1954-05-06
•
Granted: 1958-02-04
•
Expires: 1974-05-06
Abstract
No abstract record available.
Inventors
- 👤 Primich Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:24
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/14; E04D13/147; E04D13/1473; E04D13/1476; E04D13/1475; E04F; E04F17/00; E04F17/02; E04F17/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US431697A
Cited
US2039886A
Cited
US696139A
Cited
US791068A
Cited
US836933A
Cited
US1072199A
Cited
US1137778A
Cited
US1250551A
Cited
US2126499A
Cited
US2381548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |