US2803856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building formed of prefabricated panels
Assignee: Richfield Oil Corp
•
Filing: 1955-08-15
•
Granted: 1957-08-27
•
Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 David C Kofabl
- 👤 Frank G Hitchcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:00
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/343; E04B1/34315; E04B1/34321; E04B1/02; E04B1/10; E04B1/35; E04B2001/3583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1082937A
Cited
US1375402A
Cited
US1487583A
Cited
GB533628A
Cited
US2331083A
Cited
FR866433A
Cited
US2387659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |