Patent US3225413A successfully refreshed from Google Patents.
US3225413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable form for a concrete building
Assignee: Individual
•
Filing: 1964-06-25
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Granted: 1965-12-28
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Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Walter W Bird
- 👤 Peter A Strobel
- 👤 Paul I Rongved
- 👤 David P Zamore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:51
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/04; E04G11/045; Y; Y10; Y10S; Y10S425/00; Y10S425/014; Y10S425/044
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A CONCRETE BUILDING FROM COMPRISING, IN COMBINATION, AN INFLATED EVELOPE OF TRANSVERSELY CORRUGATED FORM, A SERIES OF EXTERNAL TRUSS MEMBERS DISPOSED IN THE VALLEYS OF SAID CORRUGATIONS AND INCLUDING CONNECTOR MEANS PROJECTING THROUGH SAID ENVELOPE AND INTO THE INTERIOR THEREOF, AND FLEXIBLE CONNECTOR TENSION MEANS CONNECTING THE CONNECTOR MEANS OF ADJACENT TRUSS MEMBERS TO MAINTAIN SPACING THEREBETWEEN IN CCORD WITH THE SPACING BETWEEN ADJACENT VALLEYS OF SAID CORRUGATIONS.
References Cited (Backward Citations)
US2324554A
Cited
US2616149A
Cited
US2270229A
Cited
US2624931A
Cited
US2812769A
Cited
US2948047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |